The General Theory of Employment

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    The General Theory of Employment, Interest

    and Money

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    The General Theory of Employment,

    Interest and Money

    Author John Maynard Keynes

    Country United Kingdom

    Language English

    Genre(s) Nonfiction

    Publisher Palgrave Macmillan

    Publication date 1936

    Media type PrintPaperback

    Pages 472 (2007 Edition)

    ISBN 9780230004764

    OCLCNumber 62532514

    The General Theory of Employment, Interest and Money was written by the English economist

    John Maynard Keynes. The book, generally considered to be hismagnum opus, is largely

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    credited with creating the terminology and shape of modernmacroeconomics. Published in

    February 1936 it sought to bring about a revolution, commonly referred to as the "KeynesianRevolution", in the way economists thought - especially in relation to the proposition that a

    market economy tends naturally to restore itself to full employment after temporary shocks.

    Regarded widely as the cornerstone of Keynesian thought, the book challenged the established

    classical economicsand introduced important concepts such as theconsumption function, themultiplier, the marginal efficiency of capital andliquidity preference.

    Contents

    [hide]

    1 Background 2 Summary

    o 2.1 Prefaceo 2.2 Book I: Introductiono 2.3 Book II: Definitions and Ideaso 2.4 Book III: The Propensity to Consumeo 2.5 Book IV: The Inducement to Investo 2.6 Book V: Money-Wages and Priceso 2.7 Book VI: Short Notes Suggested by the General Theory

    3 Receptiono 3.1 Criticismo 3.2 Endorsement

    4 Introductions to The General Theory 5 See also 6 Notes 7 References 8 External links

    [edit] Background

    Although The General Theory was written during theGreat Depressionand was taken by manyto justify the assumption by government of the responsibility for the achievement and

    maintenance offull employment, it is for the most part a highly abstract work of theory and by

    no means a tract on policy. Its full meaning and significance continues to be debated even today.

    As a book, its style differs from modern mainstream economic texts because its concepts areexpressed almost entirely in prose with little explicit mathematical modelling, following the

    practice ofAlfred Marshalland his other successors in 1930s Cambridge, England, and in

    contrast toneoclassical economics, which emphasizes mathematical modelling. It is enlivened bysome brilliant rhetorical passages, including the description of the stock market in Chapter 12

    and the concluding chapter 24 on the (rather tentative) policy implications Keynes derived from

    his theory.

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    [edit] Summary

    The central argument ofThe General Theory is that the level of employment is determined, notby the price of labour as inneoclassical economics, but by the spending of money (aggregate

    demand). He argues that it is wrong to assume thatcompetitivemarkets will, in the long run,

    deliver full employment or that full employment is the natural, self-righting, equilibrium state ofa monetary economy. On the contrary, under-employment and under-investment are likely to be

    the natural state unless active measures are taken. One implication of The General Theory is that

    a lack ofcompetitionis not the fundamental problem and measures to reduce unemployment bycutting wages or benefits are not only hard-hearted but ultimately futile.

    [edit] Preface

    Keynes wrote four prefaces, to the English, German, Japanese and French editions, each with a

    slightly different emphasis. In the english preface, he addresses the book to his fellow

    economists, yet mentions he hopes it will be helpful to others who read it. He also claims that the

    connection between this book and his Treatise on Money, written five years earlier, will mostlikely be clearer to him than anyone else, and that any contradictions should be viewed as an

    evolution of thought.

    [edit] Book I: Introduction

    The first book introduced what Keynes asserted would be a book that changed the way the worldthinks.

    Chapter 1: The General Theory (only half a page long) consists simply of this radicalclaim:

    "I have called this book the General Theory of Employment, Interest and Money, placing the

    emphasis on the prefix general. The object of such a title is to contrast the character of my

    arguments and conclusions with those of the classical theory of the subject, upon which I was

    brought up and which dominates the economic thought, both practical and theoretical, of thegoverning and academic classes of this generation, as it has for a hundred years past. I shall

    argue that the postulates of the classical theory are applicable to a special case only and not to the

    general case, the situation which it assumes being a limiting point of the possible positions ofequilibrium. Moreover, the characteristics of the special case assumed by the classical theory

    happen not to be those of the economic society in which we actually live, with the result that its

    teaching is misleading and disastrous if we attempt to apply it to the facts of experience." (p. 3)

    Chapter 2: The Postulates of the Classical Economics[1] Chapter 3: The Principle of Effective Demand

    [edit] Book II: Definitions and Ideas

    Chapter 4: The Choice of Units

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    Chapter 5. Expectation as Determining Output and Employment Chapter 6. The Definition of Income, Saving and Investment Chapter 7. The Meaning of Saving and Investment Further Considered

    [edit] Book III: The Propensity to Consume

    Book III moves to cover what causes people to consume, and therefore stimulate economic

    activity. In a depression the government, he argued, needs to kick start the economy's motor bydoing anything necessary. In Chapter 10 he says,

    "If the Treasury were to fill old bottles with banknotes, bury them at suitable depths in disusedcoalmines which are then filled up to the surface with town rubbish, and leave it to private

    enterprise on well-tried principles of laissez-faire to dig the notes up again (the right to do so

    being obtained, of course, by tendering for leases of the note-bearing territory), there need be no

    more unemployment and, with the help of the repercussions, the real income of the community,and its capital wealth also, would probably become a good deal greater than it actually is. It

    would, indeed, be more sensible to build houses and the like; but if there are political andpractical difficulties in the way of this, the above would be better than nothing." (p. 129)

    Chapter 8. The Propensity to Consume: I. The Objective Factors Chapter 9. The Propensity to Consume: II. The Subjective Factors Chapter 10. The Marginal Propensity to Consume and the Multiplier

    [edit] Book IV: The Inducement to Invest

    See also:Keynesian beauty contest

    TheMarginal Efficiency of Capitalis the relationship between the prospective yield of aninvestment and its supply price or replacement cost. Keynes says on page 135: "I define the

    marginal efficiency of capitalas being equal to that rate of discount which would make the

    present value of the series of annuities given by the returns expected from the capital-assetduring its life just equal to its supply price."

    Chapter 11. TheMarginal Efficiency of Capital Chapter 12. The State of Long-term Expectation Chapter 13. The General Theory of the Rate of Interest Chapter 14. The Classical Theory of the Rate of Interest Chapter 15. The Psychological and Business Incentives to Liquidity Chapter 16. Sundry Observations on the Nature of Capital Chapter 17. The Essential Properties of Interest and Money Chapter 18. The General Theory of Employment Re-stated

    [edit] Book V: Money-Wages and Prices

    This book focuses on various theories of unemployment, including Arthur Pigou's.

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    Chapter 19. Changes in Money-WagesIn this chapter Keynes demonstrates that with short-term interest rates near zero, lower wages for

    all workers (compared to lower wages for a particular group of workers) will not lead to higher

    employment. This was to tackle the argument that in depressions, what needs to happen is wage

    cuts, to get people to hire labour again.

    Chapter 20. The Employment Function Chapter 21. The Theory of Prices

    [edit] Book VI: Short Notes Suggested by the General Theory

    "It is better that a man should tyrannise over his bank balance than over his fellow citizens and

    whilst the former is sometimes denounced as being but a means to the latter, sometimes at least itis an alternative." (p. 374)

    "... the ideas of economists and political philosophers, both when they are right and when theyare wrong, are more powerful than is commonly understood. Indeed the world is ruled by little

    else. Practical men, who believe themselves to be quite exempt from any intellectual influence,

    are usually the slaves of some defunct economist. Madmen in authority, who hear voices in theair, are distilling their frenzy from some academic scribbler of a few years back. I am sure that

    the power of vested interests is vastly exaggerated compared with the gradual encroachment of

    ideas. Not, indeed, immediately, but after a certain interval; for in the field of economic and

    political philosophy there are not many who are influenced by new theories after they aretwenty-five or thirty years of age, so that the ideas which civil servants and politicians and even

    agitators apply to current events are not likely to be the newest. But, soon or late, it is ideas, not

    vested interests, which are dangerous for good or evil." (pp. 383-4))

    Chapter 22. Notes on the Trade Cycle Chapter 23. Notes on Merchantilism, the Usury Laws, Stamped Money and Theories of

    Under-consumption

    Chapter 24: Concluding Notes on the Social Philosophy towards which the GeneralTheory might Lead

    [edit] Reception

    Keynes did not set out a detailed policy program in The General Theory, but he went on inpractice to place great emphasis on the reduction of long-term interest rates[2]and the reform of

    the international monetary system[3]as structural measures needed to encourage both investmentand consumption by the private sector.

    [edit] Criticism

    From the outset there has been controversy over what Keynes really meant. Many early reviewswere highly critical.[4]

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    The success of what came to be known as neoclassical synthesisKeynesian economicsowed a

    great deal to the Harvard economistsAlvin HansenandPaul Samuelson, as well as to the OxfordeconomistSir John Hicks. Hansen and Samuelson offered a lucid explanation of Keyness theoryofaggregate demandwith their elegant 45 degreeKeynesian crossdiagram, while Hicks created

    theIS/LMdiagram. Both of these diagrams can still be found in text-books.

    Just as the reception of The General Theory was encouraged by the 1930s experience of mass

    unemployment, its fall from favour was associated with the stagflation of the 1970s. Althoughfew modern economists would disagree with the need for at least some intervention, policies

    such aslabour market flexibilityare underpinned by theneoclassicalnotion of equilibrium in the

    long run. Although Keynes explicitly addressesinflation, The General Theory does not treat it asan essentially monetary phenomenon nor suggest that control of the money supply or interest

    rates is the key remedy for inflation. This conflicts both withneoclassicaltheory and with the

    experience of pragmatic policy-makers[5]

    . Furthermore the mainKeynesianprescription for

    inflation,incomes policy, has lost credibility.

    However, many of the innovations introduced by The General Theory continue to be central tomodernmacroeconomics. For instance, the idea that recessions reflect inadequate aggregatedemand and thatSay's Law(in Keynes's formulation, that "supply creates its own demand") does

    not hold in a monetary economy. President Richard Nixon famously said in 1971 (ironically,

    shortly beforeKeynesian economicsfell out of fashion) that "We are all Keynesians now", aphrase often repeated by Nobel laureatePaul Krugman.[6]

    [edit] Endorsement

    Nevertheless, starting withAxel Leijonhufvud, this view ofKeynesian economicscame under

    increasing challenge and scrutiny[7]

    and has now divided into two main camps.

    The majority new consensus view, found in most current text-books and taught in all

    universities, isNew Keynesian economics, which accepts theneoclassicalconcept of long-run

    equilibrium but allows a role foraggregate demandin the short run. New Keynesian economistspride themselves on providing microeconomic foundations for the sticky prices and wages

    assumed by Old Keynesian economics. They do not regard The General Theory itself as helpful

    to further research.

    The minority view is represented byPost Keynesianeconomists, all of whom accept Keyness

    fundamental critique of theneoclassicalconcept of long-run equilibrium, and some of whom

    think The General Theory has yet to be properly understood and repays further study.

    [edit] Introductions to The General Theory

    The earliest attempt to write a student guide was Robinson (1937) and the most successful (by

    numbers sold) was Hansen (1953). These are both quite accessible butOld Keynesian. An up-to-

    datePost Keynesianattempt, aimed mainly at graduate and advanced undergraduate students, isHayes (2006).Paul Krugman(a New Keynesian) has written an introduction to the 2007

    Palgrave edition of The General Theory.[6]

    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    Malthusian catastrophe

    From Wikipedia, the free encyclopedia

    Jump to:navigation,search

    A Malthusian catastrophe (also phrased Malthusian check, Malthusian crisis, Malthusiandisaster, or Malthusian nightmare) was originally foreseen to be a forced return tosubsistence-

    level conditions oncepopulation growthhad outpacedagriculturalproduction. Later

    formulations considereconomicgrowth limits as well. The term is also commonly used indiscussions ofoil depletion. Based on the work of political economistThomas Malthus(17661834), theories of Malthusian catastrophe are very similar to theIron Law of Wages. The main

    difference is that the Malthusian theories predict what will happen over several generations or

    centuries, whereas the Iron Law of Wages predicts what will happen in a matter of years anddecades.

    An August 2007 science review inThe New York Timesraised the claim that theIndustrialRevolutionhad enabled the modern world to break out of the Malthusian Trap,[1]while a front

    pageWall Street Journalarticle in March 2008 pointed out various limited resources which may

    soon limit human population growth because of a widespread belief in the importance ofprosperity for every individual and the rising consumption trends of large developing nations

    such asChinaandIndia.[2]

    Contents

    [hide]

    1 Traditional Malthusian theory 2 Neo-Malthusian theory 3 Application to energy/resource consumption 4 Criticism 5 See also 6 Notes 7 References 8 External links

    [edit] Traditional Malthusian theory

    In 1798, Thomas Malthus publishedAn Essay on the Principle of Population, describing his

    theory of quantitative development of human populations:

    I think I may fairly make two postulata. First, That food is necessary to the existence of man.

    Secondly, That the passion between the sexes is necessary and will remain nearly in its present

    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://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-1http://en.wikipedia.org/wiki/Indiahttp://en.wikipedia.org/wiki/Chinahttp://en.wikipedia.org/wiki/Wall_Street_Journalhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-0http://en.wikipedia.org/wiki/Industrial_Revolutionhttp://en.wikipedia.org/wiki/Industrial_Revolutionhttp://en.wikipedia.org/wiki/The_New_York_Timeshttp://en.wikipedia.org/wiki/Iron_Law_of_Wageshttp://en.wikipedia.org/wiki/Thomas_Malthushttp://en.wikipedia.org/wiki/Oil_depletionhttp://en.wikipedia.org/wiki/Economicshttp://en.wikipedia.org/wiki/Production,_costs,_and_pricinghttp://en.wikipedia.org/wiki/Agriculturehttp://en.wikipedia.org/wiki/Population_growthhttp://en.wikipedia.org/wiki/Subsistencehttp://en.wikipedia.org/wiki/Malthusian_catastrophe#p-searchhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#head
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    state. These two laws, ever since we have had any knowledge of mankind, appear to have been

    fixed laws of our nature, and, as we have not hitherto seen any alteration in them, we have noright to conclude that they will ever cease to be what they now are, without an immediate act of

    power in that Being who first arranged the system of the universe, and for the advantage of his

    creatures, still executes, according to fixed laws, all its various operations.

    ...

    Assuming then my postulata as granted, I say, that the power of population is indefinitely greater

    than the power in the earth to produce subsistence for man. Population, when unchecked,

    increases in a geometrical ratio.

    Malthus 1798, Chapter 1,[3]

    A series that is increasing ingeometric progressionis defined by the fact that the ratio of any two

    successive members of the sequence is a constant. For example, a population with an average

    annual growth rate of, say, 2% will grow by a ratio of 1.02 per year. In other words, the ratio ofeach year's population to the previous year's population will be 1.02. In modern terminology, a

    population that is increasing in geometric progression is said to be experiencingexponential

    growth.

    Alternately, in anarithmetic progression, any two successive members of the sequence have a

    constant difference. In modern terminology, this is called linear growth.

    If unchecked over a sufficient period of time, and if the ratio between successive sequence

    members is larger than 1.0, then exponential growth will always outrun linear growth. Malthussaw the difference between population growth and resource growth as being analogous to this

    difference between exponential and linear growth. Even when a population inhabits a newhabitatsuch as the American continent at Malthus' time, or when recovering from wars andepidemic plaguesthe growth of population will eventually reach the limit of the resource base.

    (Malthus 1798, chapter 7:A Probable Cause of Epidemics).

    [edit] Neo-Malthusian theory

    Main article:World populationMain article:Overpopulation

    Neo-Malthusiantheory argues that unless at or below subsistence level, a population'sfertility

    will tend to move upwards. Assume for example that a country has 10 breeding groups. Overtime this country's fertility will approach that of its fastest growing group in the same way that

    will eventually come to resemble

    http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-2http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-2http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-2http://en.wikipedia.org/wiki/Geometric_progressionhttp://en.wikipedia.org/wiki/Geometric_progressionhttp://en.wikipedia.org/wiki/Geometric_progressionhttp://en.wikipedia.org/wiki/Exponential_growthhttp://en.wikipedia.org/wiki/Exponential_growthhttp://en.wikipedia.org/wiki/Exponential_growthhttp://en.wikipedia.org/wiki/Exponential_growthhttp://en.wikipedia.org/wiki/Arithmetic_progressionhttp://en.wikipedia.org/wiki/Arithmetic_progressionhttp://en.wikipedia.org/wiki/Arithmetic_progressionhttp://www.gutenberg.org/dirs/etext03/prppl10.txthttp://www.gutenberg.org/dirs/etext03/prppl10.txthttp://www.gutenberg.org/dirs/etext03/prppl10.txthttp://en.wikipedia.org/w/index.php?title=Malthusian_catastrophe&action=edit&section=2http://en.wikipedia.org/w/index.php?title=Malthusian_catastrophe&action=edit&section=2http://en.wikipedia.org/wiki/World_populationhttp://en.wikipedia.org/wiki/World_populationhttp://en.wikipedia.org/wiki/World_populationhttp://en.wikipedia.org/wiki/Overpopulationhttp://en.wikipedia.org/wiki/Overpopulationhttp://en.wikipedia.org/wiki/Overpopulationhttp://en.wikipedia.org/wiki/Neo-Malthusianismhttp://en.wikipedia.org/wiki/Neo-Malthusianismhttp://en.wikipedia.org/wiki/Fertilityhttp://en.wikipedia.org/wiki/Fertilityhttp://en.wikipedia.org/wiki/Fertilityhttp://en.wikipedia.org/wiki/Fertilityhttp://en.wikipedia.org/wiki/Neo-Malthusianismhttp://en.wikipedia.org/wiki/Overpopulationhttp://en.wikipedia.org/wiki/World_populationhttp://en.wikipedia.org/w/index.php?title=Malthusian_catastrophe&action=edit&section=2http://www.gutenberg.org/dirs/etext03/prppl10.txthttp://en.wikipedia.org/wiki/Arithmetic_progressionhttp://en.wikipedia.org/wiki/Exponential_growthhttp://en.wikipedia.org/wiki/Exponential_growthhttp://en.wikipedia.org/wiki/Geometric_progressionhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-2
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    regardless of how large the constant a is or how small the constant b is. Under subsistence

    conditions the fastest growing group is likely to be that group progressing most rapidly inagriculturaltechnology. However, in above-subsistence conditions the fastest growing group is

    likely to be the one with the highest fertility. Therefore the fertility of the country will approachthat of its most fertile group. This, however, is only part of the problem.

    In any group some individuals will be more pro-fertility in their beliefs and practices than others.

    According to neo-Malthusian theory, these pro-fertility individuals will not only have morechildren, but also pass their pro-fertility on to their children, meaning a constant selection for

    pro-fertility similar to the constantnatural selectionfor fertilitygenes(except much faster

    because of greater diversity). According to neo-Malthusians, this increase in fertility will lead to

    hyperexponential population growth that will eventually outstrip growth in economic production.This appears to make any sort of voluntary fertility control futile, in the long run. Neo-

    Malthusians argue that although adult immigrants (who, at the very least, arrive withhuman

    capital) contribute to economic production, there is little or no increase in economic productionfrom increased natural growth and fertility. Neo-Malthusians argue that hyperexponentialpopulation growth has begun or will begin soon in developed countries.

    To this can be added that farmland deteriorates with use. Some areas where there was intensive

    agriculture in classic times (i.e., the feudal era) had already declined in population because their

    farmland was worn out, long before he wrote.

    At the time Malthus wrote, and for 150 years thereafter, most societies had populations at or

    beyond their agricultural limits.[citation needed] AfterWorld War II, the so-calledGreen Revolution

    produced a dramatic increase in productivity of agriculture, and, consequently, growth of the

    world's food supply. In response, the growth rate of the world's population accelerated rapidly,resulting in predictions byPaul R. Ehrlich,Simon Hopkins,

    [4]and many others of an imminent

    Malthusian catastrophe. However, populations of most developed countries grew slowly enoughto be outpaced by gains in productivity. By 1990, agricultural production appeared to begin

    peaking in several world regions.[5]

    By the early 21st century, many technologically developed countries had passed through the

    demographic transition, a complex social development encompassing a drop intotal fertility

    ratesin response to lowerinfant mortality, more education of women, increasedurbanization,and a wider availability of effectivebirth control, causing thedemographic-economic paradox.

    Developed and developing countries follow two distinct paths. Most developed countries have

    sufficient food supply, low fertility rates, and stable (in some cases even declining) populations.In some cases, population growth occurs due to increasing life expectancies, even though fertilityrates are below replacement. For example, As of 2008,Spainhas approximately 4.6 km2 of

    arable land or permanent crops per 1,000 residents, and its average fertility rate is well below

    replacement level (1.3 children/woman). Its population has grown less than 50% in the last 40years.[6]The corresponding ratio forNigeriais only 2.1 km2 of arable land or crops per 1,000

    residents; Nigerian total fertility rate is 5.0 children/woman, and its population has more than

    tripled during the same 40 years. The Malthusian catastrophe appears to have been temporarily

    http://en.wikipedia.org/wiki/Technologyhttp://en.wikipedia.org/wiki/Technologyhttp://en.wikipedia.org/wiki/Technologyhttp://en.wikipedia.org/wiki/Natural_selectionhttp://en.wikipedia.org/wiki/Natural_selectionhttp://en.wikipedia.org/wiki/Natural_selectionhttp://en.wikipedia.org/wiki/Genehttp://en.wikipedia.org/wiki/Genehttp://en.wikipedia.org/wiki/Genehttp://en.wikipedia.org/wiki/Human_capitalhttp://en.wikipedia.org/wiki/Human_capitalhttp://en.wikipedia.org/wiki/Human_capitalhttp://en.wikipedia.org/wiki/Human_capitalhttp://en.wikipedia.org/wiki/Wikipedia:Citation_neededhttp://en.wikipedia.org/wiki/Wikipedia:Citation_neededhttp://en.wikipedia.org/wiki/Wikipedia:Citation_neededhttp://en.wikipedia.org/wiki/World_War_IIhttp://en.wikipedia.org/wiki/World_War_IIhttp://en.wikipedia.org/wiki/World_War_IIhttp://en.wikipedia.org/wiki/Green_Revolutionhttp://en.wikipedia.org/wiki/Green_Revolutionhttp://en.wikipedia.org/wiki/Green_Revolutionhttp://en.wikipedia.org/wiki/Paul_R._Ehrlichhttp://en.wikipedia.org/wiki/Paul_R._Ehrlichhttp://en.wikipedia.org/wiki/Paul_R._Ehrlichhttp://en.wikipedia.org/w/index.php?title=Simon_Hopkins&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Simon_Hopkins&action=edit&redlink=1http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-3http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-3http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-3http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-4http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-4http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-4http://en.wikipedia.org/wiki/Demographic_transitionhttp://en.wikipedia.org/wiki/Demographic_transitionhttp://en.wikipedia.org/wiki/Total_fertility_ratehttp://en.wikipedia.org/wiki/Total_fertility_ratehttp://en.wikipedia.org/wiki/Total_fertility_ratehttp://en.wikipedia.org/wiki/Total_fertility_ratehttp://en.wikipedia.org/wiki/Infant_mortalityhttp://en.wikipedia.org/wiki/Infant_mortalityhttp://en.wikipedia.org/wiki/Infant_mortalityhttp://en.wikipedia.org/wiki/Urbanizationhttp://en.wikipedia.org/wiki/Urbanizationhttp://en.wikipedia.org/wiki/Urbanizationhttp://en.wikipedia.org/wiki/Birth_controlhttp://en.wikipedia.org/wiki/Birth_controlhttp://en.wikipedia.org/wiki/Birth_controlhttp://en.wikipedia.org/wiki/Demographic-economic_paradoxhttp://en.wikipedia.org/wiki/Demographic-economic_paradoxhttp://en.wikipedia.org/wiki/Demographic-economic_paradoxhttp://en.wikipedia.org/wiki/Spainhttp://en.wikipedia.org/wiki/Spainhttp://en.wikipedia.org/wiki/Spainhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-5http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-5http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-5http://en.wikipedia.org/wiki/Nigeriahttp://en.wikipedia.org/wiki/Nigeriahttp://en.wikipedia.org/wiki/Nigeriahttp://en.wikipedia.org/wiki/Nigeriahttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-5http://en.wikipedia.org/wiki/Spainhttp://en.wikipedia.org/wiki/Demographic-economic_paradoxhttp://en.wikipedia.org/wiki/Birth_controlhttp://en.wikipedia.org/wiki/Urbanizationhttp://en.wikipedia.org/wiki/Infant_mortalityhttp://en.wikipedia.org/wiki/Total_fertility_ratehttp://en.wikipedia.org/wiki/Total_fertility_ratehttp://en.wikipedia.org/wiki/Demographic_transitionhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-4http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-3http://en.wikipedia.org/w/index.php?title=Simon_Hopkins&action=edit&redlink=1http://en.wikipedia.org/wiki/Paul_R._Ehrlichhttp://en.wikipedia.org/wiki/Green_Revolutionhttp://en.wikipedia.org/wiki/World_War_IIhttp://en.wikipedia.org/wiki/Wikipedia:Citation_neededhttp://en.wikipedia.org/wiki/Human_capitalhttp://en.wikipedia.org/wiki/Human_capitalhttp://en.wikipedia.org/wiki/Genehttp://en.wikipedia.org/wiki/Natural_selectionhttp://en.wikipedia.org/wiki/Technology
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    averted in Spain, although the Neo-Malthusian theory argues that the situation is only temporary;

    on the other hand, a significant part of population of Nigeria lives near subsistence levels.

    David PimentelandRon Nielsen, working independently, determined that the human population

    as a whole has passed the numerical point where all can live in comfort, and that we have entered

    a stage where many of the world's citizens and future generations are trapped in misery .

    [7]

    Thereis evidence that a catastrophe is underway as of at least the 1990s; for example, by the year 2000,

    children in developing countries were dying at the rate of approximately 11,000,000 per annumfrom strictly preventable diseases.[8][9]These data suggest that, by the standard of misery, the

    catastrophe is underway. The term 'misery' can generally be construed as: highinfant mortality,

    low standards of sanitation,malnutrition,inadequate drinking water, widespread diseases, war,and political unrest.

    Regarding famines, data demonstrate the world's food production has peaked in some of the very

    regions where food is needed the most. For example, inSouth Asia, approximately half of theland has been degraded such that it no longer has the capacity for food production.[9]In China

    there has been a 27% irreversible loss of land for agriculture, and it continues to lose arable landat the rate of 2,500 square kilometres per year.[10]

    InMadagascar, at least 30% of the landpreviously regarded as arable is irreversibly barren. On the other hand, recent data show the

    number of overweight people in the world now outnumbers that of malnourished, and the rising

    tide ofobesitycontinues to expand in both rich and poor countries.[11]

    On the assumption that thedemographic transitionis now spreading from the developed

    countries toless developed countries, theUnited Nations Population Fundestimates that humanpopulation may peak in the late 21st century rather than continue to grow until it has exhausted

    available resources.[12]Some have expressed doubt about the validity of the UN projections,

    claiming that they are below the projections by others.[9]

    The most important point is that none of

    the projections show the population growth beginning to decline before 2050. Indeed, the UN"high" estimate does not decline at all, even out to 2300, indicating the potential for a Malthusian

    catastrophe.[12]

    The actual growth curve of the human population is another issue. In the latter part of the 20th

    century, many argued that it followedexponential growth; however, a more recent view is that

    the growth in the last millennium has been faster, at a superexponential (possiblyhyperbolic,double-exponential, orhyper-exponential) rate.[13]Alternatively, the apparently exponential

    portion of the human population growth curve may actually fit the lower limb of alogistic curve,

    or a section of aLotkaVolterra cycle.

    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    World population from 1800 to 2100, based onUN 2004 projections(red, orange, green) andUSCensus Bureau historical estimates(black).

    Historians have estimated the total human population on earth back to 10,000 BC.[14]

    The figure

    on the right shows the trend of total population from 1800 to 2005, and from there in threeprojections out to 2100 (low, medium, and high).[12]The second figure shows the annual growth

    rate over the same period. If population growth were exactly exponential, then the growth rate

    would be a flat line. The fact that it was increasing from 1920 to 1960 indicates faster-than-exponential growth over this period. However, the growth rate has been decreasing since then,

    and is projected to continue decreasing.[15]

    The United Nations population projections out to

    2100 (the red, orange, and green lines) show a possible peak in the world's population occurringas early as 2040 in the most optimistic scenario, and by 2075 in the "medium" scenario.

    http://www.un.org/esa/population/publications/longrange2/WorldPop2300final.pdfhttp://www.un.org/esa/population/publications/longrange2/WorldPop2300final.pdfhttp://www.un.org/esa/population/publications/longrange2/WorldPop2300final.pdfhttp://www.census.gov/ipc/www/worldhis.htmlhttp://www.census.gov/ipc/www/worldhis.htmlhttp://www.census.gov/ipc/www/worldhis.htmlhttp://www.census.gov/ipc/www/worldhis.htmlhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-13http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-13http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-13http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-UN-11http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-UN-11http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-UN-11http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-USCB-14http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-USCB-14http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-USCB-14http://en.wikipedia.org/wiki/File:World-Population-1800-2100.pnghttp://en.wikipedia.org/wiki/File:World-Population-1800-2100.pnghttp://en.wikipedia.org/wiki/File:World-Population-1800-2100.pnghttp://en.wikipedia.org/wiki/File:World-Population-1800-2100.pnghttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-USCB-14http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-UN-11http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-13http://www.census.gov/ipc/www/worldhis.htmlhttp://www.census.gov/ipc/www/worldhis.htmlhttp://www.un.org/esa/population/publications/longrange2/WorldPop2300final.pdf
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    A chart of estimated annual growth rates in world population, 1800-2005. Rates before 1950 areannualized historical estimates from theUS Census Bureau. Red = USCB projections to 2025.

    The graph of annual growth rates (below) does not appear exactly as one would expect for long-term exponential growth. For exponential growth it should be a straight line at constant height,

    whereas in fact the graph from 1800 to 2005 is dominated by an enormous hump that began

    about 1920, peaked in the mid-1960s, and has been steadily eroding away for the last 40 years.

    The sharp fluctuation between 1959 and 1960 was due to the combined effects of theGreat LeapForwardand a natural disaster in China.[15]Also visible on this graph are the effects of theGreat

    Depression, the two world wars, and possibly also the1918 flu pandemic.

    Though short-term trends, even on the scale of decades or centuries, cannot prove or disprove the

    existence of mechanisms promoting a Malthusian catastrophe over longer periods, the prosperity

    of a small fraction of the human population at the beginning of the 21st century, and thedebatability ofecological collapsemade byPaul R. Ehrlichin the 1960s and 1970s, has led some

    people, such as economistJulian L. Simon, to question its inevitability.[16]

    A 2004 study by a group of prominent economists and ecologists, includingKenneth Arrowand

    Paul Ehrlich[17]

    suggests that the central concerns regarding sustainability have shifted from

    population growth to the consumption/savings ratio, due to shifts in population growth ratessince the 1970s. Empirical estimates show that public policy (taxes or the establishment of more

    complete property rights) can promote more efficient consumption and investment that are

    sustainable in an ecological sense; that is, given the current (relatively low) population growth

    rate, the Malthusian catastrophe can be avoided by either a shift in consumer preferences orpublic policy that induces a similar shift.

    However, some contend that the Malthusian catastrophe is not imminent. A 2002 study[18]

    by theUN Food and Agriculture Organizationpredicts that world food production will be in excess of

    the needs of the human population by the year 2030; however, that source also states that

    http://www.census.gov/ipc/www/worldhis.htmlhttp://www.census.gov/ipc/www/worldhis.htmlhttp://www.census.gov/ipc/www/worldhis.htmlhttp://en.wikipedia.org/wiki/Great_Leap_Forwardhttp://en.wikipedia.org/wiki/Great_Leap_Forwardhttp://en.wikipedia.org/wiki/Great_Leap_Forwardhttp://en.wikipedia.org/wiki/Great_Leap_Forwardhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-USCB-14http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-USCB-14http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-USCB-14http://en.wikipedia.org/wiki/Great_Depressionhttp://en.wikipedia.org/wiki/Great_Depressionhttp://en.wikipedia.org/wiki/Great_Depressionhttp://en.wikipedia.org/wiki/Great_Depressionhttp://en.wikipedia.org/wiki/1918_flu_pandemichttp://en.wikipedia.org/wiki/1918_flu_pandemichttp://en.wikipedia.org/wiki/1918_flu_pandemichttp://en.wikipedia.org/wiki/Ecological_collapsehttp://en.wikipedia.org/wiki/Ecological_collapsehttp://en.wikipedia.org/wiki/Ecological_collapsehttp://en.wikipedia.org/wiki/Paul_R._Ehrlichhttp://en.wikipedia.org/wiki/Paul_R._Ehrlichhttp://en.wikipedia.org/wiki/Paul_R._Ehrlichhttp://en.wikipedia.org/wiki/Julian_Lincoln_Simonhttp://en.wikipedia.org/wiki/Julian_Lincoln_Simonhttp://en.wikipedia.org/wiki/Julian_Lincoln_Simonhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-15http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-15http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-15http://en.wikipedia.org/wiki/Kenneth_Arrowhttp://en.wikipedia.org/wiki/Kenneth_Arrowhttp://en.wikipedia.org/wiki/Kenneth_Arrowhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-16http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-16http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-17http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-17http://en.wikipedia.org/wiki/United_Nations_Food_and_Agriculture_Organizationhttp://en.wikipedia.org/wiki/United_Nations_Food_and_Agriculture_Organizationhttp://en.wikipedia.org/wiki/File:World_population_growth_rates_1800-2005.pnghttp://en.wikipedia.org/wiki/File:World_population_growth_rates_1800-2005.pnghttp://en.wikipedia.org/wiki/File:World_population_growth_rates_1800-2005.pnghttp://en.wikipedia.org/wiki/File:World_population_growth_rates_1800-2005.pnghttp://en.wikipedia.org/wiki/United_Nations_Food_and_Agriculture_Organizationhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-17http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-16http://en.wikipedia.org/wiki/Kenneth_Arrowhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-15http://en.wikipedia.org/wiki/Julian_Lincoln_Simonhttp://en.wikipedia.org/wiki/Paul_R._Ehrlichhttp://en.wikipedia.org/wiki/Ecological_collapsehttp://en.wikipedia.org/wiki/1918_flu_pandemichttp://en.wikipedia.org/wiki/Great_Depressionhttp://en.wikipedia.org/wiki/Great_Depressionhttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-USCB-14http://en.wikipedia.org/wiki/Great_Leap_Forwardhttp://en.wikipedia.org/wiki/Great_Leap_Forwardhttp://www.census.gov/ipc/www/worldhis.html
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    hundreds of millions will remain hungry (presumably due to economic realities and political

    issues).

    [edit] Application to energy/resource consumption

    Further information:Oil depletion

    A bell-shaped production curve, as originally suggested byM. King Hubbertin 1956.

    Another way of applying the Malthusian theory is to substitute other resources, such as sourcesofenergyfor food, and energy consumption for population. (Since modern food production andlogistics is energy and resource intensive, this is not a big jump. Most of the criteria for applying

    the theory are still satisfied.) Since energy consumption is increasing much faster than

    population, and most energy comes from non-renewable sources, the catastrophe appears more

    imminent, though perhaps not as certain, than when considering food and population continue tobehave in a manner contradicting Malthus's assumptions.

    Retired physics professorAlbert Bartlett, a modern-dayMalthusian, has lectured on "Arithmetic,Population and Energy" over 1,500 times. He published an article entitledThoughts on Long-

    Term Energy Supplies: Scientists and the Silent Liein Physics Today (July 2004). For a responseto Bartlett's argument, see two articles on energy and population in Physics Today, November2004,[19]and following letters to the editor.

    A further way of analyzing resource limitation is the dwindling area for storage ofsoil

    contaminantsandwater pollution. The high rate of increase in toxic chemicals in the

    environment (especially persistent organic chemicals and endocrine altering chemicals) is

    creating a circumstance of resource limitation (e.g. safe potable water and safe arable land).

    [edit] Criticism

    Ester Bserupwrote in her bookThe Conditions of Agricultural Growth: The Economics of

    Agrarian Change under Population Pressure that population levels determine agricultural

    methods, rather than agricultural methods determining population (via food supply). A major

    point of her book is that "necessity is the mother of invention".

    Julian Simonwas one of many economists who challenged the Malthusian catastrophe, citing (1)

    the existence of new knowledge, and educated people to take advantage of it, and (2) "economic

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    freedom", that is, the ability of the world to increase production when there is a profitable

    opportunity to do so.[20]

    The economistHenry Georgeargued that Malthus didn't provide any evidence of a natural

    tendency for a population to overwhelm its ability to provide for itself. George wrote that even

    the main body of Malthus' work refuted this theory; that examples given show social causes formisery, such as "ignorance and greed... bad government, unjust laws, or war," rather than

    insufficient food production.[21]

    http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-19http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-19http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-19http://en.wikipedia.org/wiki/Henry_Georgehttp://en.wikipedia.org/wiki/Henry_Georgehttp://en.wikipedia.org/wiki/Henry_Georgehttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-20http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-20http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-20http://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-20http://en.wikipedia.org/wiki/Henry_Georgehttp://en.wikipedia.org/wiki/Malthusian_catastrophe#cite_note-19