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Paul R. Ehrlich

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For other people named Paul Ehrlich, see Paul Ehrlich (disambiguation).
Paul R. Ehrlich
Ehrlich in 1974
Born
Paul Ralph Ehrlich

(1932-05-29) May 29, 1932 (age 92)
Philadelphia, Pennsylvania, USA
NationalityAmerican
Alma materUniversity of Pennsylvania, A.B.
University of Kansas, M.A., Ph.D.
Known forThe Population Bomb
Spouse(s)Anne H. Ehrlich, m. 1954
ChildrenLisa Marie
AwardsSweden's Crafoord Prize in ecology (1990)
Fellow of the Royal Society (2012)[1]
Scientific career
FieldsEntomology, Population Studies
InstitutionsStanford University
Doctoral advisorC.D. Michener

Paul Ralph Ehrlich (born May 29, 1932) is an American biologist and educator who is the Bing Professor of Population Studies in the department of Biological Sciences at Stanford University and president of Stanford's Center for Conservation Biology.[2] By training he is an entomologist specializing in Lepidoptera (butterflies), but he is also a prominent ecologist and demographer. Ehrlich is best known for his dire warnings about population growth[3] and limited resources. Ehrlich became well-known after publication of his controversial 1968 book The Population Bomb.[4][5] In the years since, some of Ehrlich's predictions have proven incorrect, but he stands by his general thesis that the human population is too large and is a direct threat to human survival and the environment of the planet.

Early life

Publicity photo.

Ehrlich was born in Philadelphia, Pennsylvania, the son of Ruth (Rosenberg) and William Ehrlich, a salesman.[4] His father was a shirt salesman, his mother a Greek and Latin scholar.[6]

Ehrlich earned a bachelors degree in zoology from the University of Pennsylvania in 1953, an M.A. at the University of Kansas in 1955, and a Ph.D. in 1957 at the University of Kansas, supervised by the prominent bee researcher C.D. Michener. During his studies he participated in surveys of insects on the Bering Sea and in the Canadian Arctic, and then with a National Institutes of Health fellowship, investigated the genetics and behavior of parasitic mites. In 1959 he joined the faculty at Stanford, being promoted to professor of biology in 1966. He was named to the Bing Professorship in 1977,[7] and he is president of the Center for Conservation Biology at Stanford University.[8] Additionally, Ehrlich is a fellow of the American Association for the Advancement of Science, the United States National Academy of Sciences, the American Academy of Arts and Sciences and the American Philosophical Society.[7]

Career

Over-population debate

Graph of human population from 10,000 BCE–2000 CE, showing the immense population growth since the 19th century

A lecture that Dr. Ehrlich gave on the topic of overpopulation at the Commonwealth Club was broadcast on the radio in April 1967.[9] The success of the lecture led to further publicity, and the suggestion from David Brower the executive director of the environmentalist Sierra Club, and Ian Ballantine of Ballantine Books to write a book on the topic. Anne and Paul both collaborated on the book, The Population Bomb but the publisher insisted that a single author be credited.[10]

File:2008 Summer Olympics torch relay, Shenzen.jpg
In the 1950s and 60s fears about the consequences of overpopulation were widespread. Crowd assembled to view the 2008 Summer Olympics torch relay, Shenzen, China

Although Ehrlich was not the first to raise the alarm about population issues – concern had been widespread in the 1950s and 1960s – his charismatic and media-savvy approach brought the issue to a new level of media prominence.[11][12]

The Population Bomb

The Population Bomb began with this statement: The battle to feed all of humanity is over. In the 1970s hundreds of millions of people will starve to death in spite of any crash programs embarked upon now. At this late date nothing can prevent a substantial increase in the world death rate ...[13] Ehrlich argued that the human population was too high already, and that while the level of disaster could be mitigated, humanity could not prevent severe famines, the spread of disease, social unrest, and other negative consequences of overpopulation. However, he argued that societies must take strong action to curb population growth in order to mitigate future disasters both ecological and social.

In the book Ehrlich presented a number of "scenarios" detailing possible future events, some of which have been held up as examples of errors in the years since. Of these scenarios, Ehrlich has said that although, "we clearly stated that they were not predictions and that 'we can be sure that none of them will come true as stated,’ (p. 72) – their failure to occur is often cited as a failure of prediction. In honesty, the scenarios were way off, especially in their timing (we underestimated the resilience of the world system). But they did deal with future issues that people in 1968 should have been thinking about." Ehrlich further states that he stands behind the central thesis of the book, and that its message is as apt today as it was in 1968.[10]

Ehrlich's views on the situation have evolved over time, and he has presented a number of different proposed solutions. However, he always has been a strong advocate of government intervention into population control.[citation needed] In Population Bomb he wrote, "We must have population control at home, hopefully through a system of incentives and penalties, but by compulsion if voluntary methods fail. We must use our political power to push other countries into programs which combine agricultural development and population control."[13] Voluntary measures he has supported include the easiest possible availability of birth control and abortions. He was not opposed to mandatory population control if necessary, including the suspension of food aid to countries which were considered "hopeless" to feed their populations.[14] Critics have alleged that he was in favor of forced abortion and sterilization. However, this is not true. The Ehrlichs did describe these coercive methods in their 1977 textbook, Ecoscience: Population, Resouces, Environment but they did not endorse them, saying, "A far better choice, in our view, is to expand the use of milder methods of influencing family size preferences, while redoubling efforts to ensure that the means of birth control, including abortion and sterilization, are accessible to every human being on Earth within the shortest possible time. If effective action is taken promptly against population growth, perhaps the need for the more extreme involuntary or repressive measures can be averted in most countries."[15] Today Paul Ehrlich has become more focused on the United States, claiming that it must get its population (and consumption) under control as an example to the rest of the world. He has disavowed some of the what he said in The Population Bomb. He still thinks that governments should incentivize people to have two or fewer children, for example through high taxes on people who have more.[16] Ehrlich believes there is an "optimal" human population, given current technological realities.[17] He believes that policy should be geared toward driving the global population toward that number (1.5-2 billion according to his 1994 estimate).

During a 2004 interview, Ehrlich answered questions about the predictions he made in The Population Bomb. He acknowledged that some of what he had written had not "come to pass", but reaffirmed his basic claim that "population growth was a major problem. Fifty-eight academies of science said that same thing in 1994, as did the world scientists' warning to humanity in the same year. My view has become depressingly mainline!", he said.[18] Ehrlich also noted that 600 million people were very hungry, billions were under-nourished, and stated that his predictions about disease and climate change were essentially correct.[18]

Retrospectively, Ehrlich believes that The Population Bomb was "way too optimistic".[9]

Criticism

However, critics have disputed Ehrlich's central thesis about overpopulation and its effects on the environment and human society, his solutions, as well as some of his specific predictions made since the late 1960s.

Wheat yields in developing countries, 1950 to 2004, kg/HA baseline 500

One frequent criticism focuses on Ehrlich's allegedly alarmist tone and sensational statements and "predictions" that have turned out to be false. Ronald Bailey of Reason Magazine has called him an "irrepressible doomster ... who, as far as I can tell, has never been right in any of his forecasts of imminent catastrophe."[19] On the first Earth Day in 1970, he warned that "[i]n ten years all important animal life in the sea will be extinct. Large areas of coastline will have to be evacuated because of the stench of dead fish."[19] In a 1971 speech, he predicted that: "By the year 2000 the United Kingdom will be simply a small group of impoverished islands, inhabited by some 70 million hungry people ... If I were a gambler, I would take even money that England will not exist in the year 2000."[19] When this scenario did not come to pass, he responded that "When you predict the future, you get things wrong. How wrong is another question. I would have lost if I had had taken the bet. However, if you look closely at England, what can I tell you? They're having all kinds of problems, just like everybody else."[19] Ehrlich wrote in The Population Bomb that, "India couldn't possibly feed two hundred million more people by 1980."[13]

A common reply to this criticism is that it was precisely the alarmist rhetoric that prevented the catastrophes he warned of. Carl Haub of the Population Reference Bureau has said, "It makes no sense that Ehrlich is now criticized as being alarmist because his dire warnings did not, in the main, come true. But it was because of such warnings from Ehrlich and others that countries took action to avoid potential disaster."[20] However, even setting aside the fact the Ehrlich projected unstoppable famines, the fact is, that world population growth did not change. In 1970s, United Nations projections for world population in the year 2000 was six billion. This figure was reached in October, 1999,[21] almost exactly as projected when Ehrlich's book was published.

Some have criticized Ehrlich's proposed solutions to the problems he describes. For example, Barry Commoner criticized his 1970 statement that "When you reach a point where you realize further efforts will be futile, you may as well look after yourself and your friends and enjoy what little time you have left. That point for me is 1972."[22] Dan Gardner, among others,[14] has criticized him for endorsing the strategies to avoid the worst effects of famine that William and Paul Paddock proposed in their book Famine 1975! They had proposed a system of "triage" that would cut off food aid to "hopeless" countries such as India and Egypt. In Population Bomb Ehrlich suggests that "there is no rational choice except to adopt some form of the Paddocks' strategy as far as food distribution is concerned." Had this strategy been implemented, in countries such as India and Egypt, which were reliant on food aid at that time, they would almost certainly have been plunged into famines.[12] As it turned out, both Egypt and India have greatly increased their food production and now feed much larger populations without reliance on food aid.[14]

In 2006, Lara Knudsen[23] wrote that Ehrlich's views were accepted by many population control advocates in the United States and Europe during the 1960s and 1970s.[24] She chose a brief passage from the final chapter of Population Bomb to show that Ehrlich had discussed an extreme solution to extreme cases of overpopulation: "compulsory birth regulation ... (through) the addition of temporary sterilants to water supplies or staple food. Doses of the antidote would be carefully rationed by the government to produce the desired family size."[24]

Some have criticized Ehrlich for not sufficiently acknowledging the mistakes he has made in the past, and maintaining a consistent argument in spite of new countervailing evidence.[11][12] Gardner believes that Ehrlich has been insufficiently forthright in acknowledging errors he made, while being intellectually dishonest or evasive in taking credit for things he claims he got "right". For example, he rarely acknowledges the mistakes he made in predicting material shortages, massive death tolls from starvation (up to one billion in Age of Affluence) or regarding the collapse of specific countries. Meanwhile, he is happy to claim credit for "predicting" the rise of AIDS or global warming. However, in the case of disease, Ehrlich had predicted the rise of a disease based on overcrowding, or the weakened immune systems of starving people, so it is "a stretch to see this as forecasting the emergence of AIDS in the 1980s." Similarly, global warming was one of the scenarios that Ehrlich outlined, so claiming credit for it, while disavowing responsibility for failed scenarios is a double standard. Gardner believes that Ehrlich is displaying classical signs of cognitive dissonance, and that his failure to grapple with obvious errors in his own judgement render his current thinking suspect.[12]

Ehrlich believes that some of the agricultural practices employed to increase food yields have simply delayed catastrophe. For example, the use of antibiotics in Industrial Agriculture.

Ronald Bailey, a leader in the wise use movement, wrote a book in 1993 entitled Eco-Scam, in which he strongly criticized the views of Ehrlich, Lester Brown, Carl Sagan and other environmental theorists.

A large increase in global food production since the 1960s has prevented the famines and catastrophes foretold by Ehrlich.
Ehrlich maintains that growing population and affluence will continue to put unsustainable pressure on the global environment.

Left-wing perspectives

Another school, generally coming from the political left argues that Ehrlich focuses too much on overpopulation as a problem in itself, instead of distribution of resources.[10] Marxists worried that Ehrlich's work could be used to justify genocide and imperial control, as well as oppression of minorities and disadvantaged groups or even a return to eugenics.[25] Barry Commoner argued that Ehrlich was too focused on overpopulation as the source of environmental problems, and that his proposed solutions were politically unacceptable because of the coercion that they implied, and because the cost would fall disproportionately on the poor. He argued that technological, and above all social development would lead to a natural decrease in both population growth and environmental damage.[26] Ehrlich denies any form of racism, and has argued that if his policy ideas are implemented properly they will not be repressive.[27]

Other perspectives

Still others have argued that overpopulation is not a problem in itself, and that humanity will adapt to changing conditions. One example was Julian Lincoln Simon, a Cornucopian economist and libertarian theorist who authored the book The Ultimate Resource, in which he argued that a larger population is a benefit, not a cost. Of the repeated predictions of disaster, Simon complained "As soon as one predicted disaster doesn't occur, the doomsayers skip to another ... why don't [they] see that, in the aggregate, things are getting better? ... Why do they always think we're at a turning point — or at the end of the road?"[5] Simon argued that in the long run, human creativity would constantly improve living standards, and that the Earth's resources were, in effect, infinite.[28] Ehrlich questioned the peer review standards at Science which was considered one of the leading scientific journals at the time. He questioned Simon's intelligence and re-asserted the idea that population growth was outstripping the earth's supplies of food, fresh water and minerals.[5]

The aforementioned exchange eventually led to the Simon-Ehrlich wager, a bet about the trend of prices for certain metals that he made in 1980 with, and lost to, Julian Simon.[5] Simon had Ehrlich choose five of several commodity metals. Ehrlich chose copper, chromium, nickel, tin, and tungsten. Simon bet that their prices would decrease between 1980 and 1990; Ehrlich bet they would increase.[note 1] Ehrlich ultimately lost the bet. Over the years the two maintained a public debate, but never met face to face. Ehrlich considered Simon a "fringe" character, and refused to meet.[5][29]

The Skeptical Environmentalist

Ehrlich has also been criticized by Bjørn Lomborg in his book, The Skeptical Environmentalist. Lomborg highlights a repeated theme of Ehrlich's from the early 1970s—a coming age of material scarcity, most prominently displayed in his 1974 book The End of Affluence in which he predicted widespread shortages of vital materials by the mid-1980s along with acute food shortages. Lomborg presents Ehrlich's case as a cautionary story against listening to "eloquent rhetoric" at the expense of rigorous scientific data.[30]

Writing with Stephen Schneider and two other authors, in the January 2002 issue of Scientific American, Ehrlich critiqued Lomborg's The Skeptical Environmentalist. They [who?][31] argue that Lomborg's timing was incorrect and that humanity has simply deferred the moment of disaster through the use of more intensive agricultural techniques, introduced during the Green Revolution, which will eventually lead to environmental and social disaster.[32] Ehrlich et al. argue that increasing populations and affluence are putting more and more pressure on the global environment in many different fields, from loss of biodiversity, overfishing, global warming, to urbanization, chemical pollution and competition for raw materials. Ehrlich maintains that in light of growing global affluence, reducing total population as well as reducing consumption are critical to protecting the environment and maintaining living standards.[33] Ehrlich maintains that current rates of growth are still too high for a sustainable future.[34][35]

2010 onwards

In 2011, as the world's population passed the seven billion mark Ehrlich has argued that the next two billion people on Earth would cause more damage than the previous two billion because we are now increasingly having to resort to using more marginal and environmentally damaging resources.[36] As of 2013, Ehrlich continues to perform policy research concerning population and resource issues, with an emphasis upon endangered species, cultural evolution, environmental ethics, and the preservation of genetic resources. Along with Dr. Gretchen Daily, he has performed work in countryside biogeography; that is, the study of making human-disturbed areas hospitable to biodiversity. His research group at Stanford University examines extensively natural populations of the Bay checkerspot butterfly (Euphydryas).[37]

Ehrlich conducted a tour of Australia in early March 2013 and, despite receiving criticism from Australians regarding his views on over-population, the scientist maintained his belief that Australians are "over-populating".[38]

Other activities

Ehrlich was one of the founders of the group Zero Population Growth during 1968, along with Richard Bowers and Charles Remington. He and his wife Anne were on the board of advisers of the Federation for American Immigration Reform until 2003. He is currently a patron of Population Matters, (formerly known as the Optimum Population Trust).

Ehrlich has spoken at conferences in Israel on the issue of desertification. He has argued that "True Zionists should have small families".[39]

Personal life

Ehrlich is Jewish and has been married to Anne H. Ehrlich (born Anne Fitzhugh Howland, 1933) since 1954; he and Anne are parents to one child, Lisa Marie.[40]

Awards and honors

Bibliography

  • How to Know the Butterflies (1960)
  • Process of Evolution (1963)
  • The Population Bomb (1968)
  • Population, Resources, Environments: Issues in Human Ecology (1970)
  • How to Be a Survivor (1971)
  • Man and the Ecosphere: Readings from Scientific American (1971)
  • Population, Resources, Environments: Issues in Human Ecology Second Edition (1972)
  • Human Ecology: Problems and Solutions (1973)
  • Introductory Biology (1973)
  • The End of Affluence (1975)
  • Biology and Society (1976)
  • Ecoscience: Population, Resources, Environment (1978)
  • The Race Bomb (1978)
  • Extinction (1981)
  • The Golden Door: International Migration, Mexico, and the United States (1981)
  • The Machinery of Nature: The Living World Around Us and How it Works (1986)
  • The Cold and the Dark: The World after Nuclear War (1984, co-authored with Carl Sagan, Donald Kennedy, and Walter Orr Roberts)
  • Earth (1987, co-authored with Anne Ehrlich)
  • Science of Ecology (1987, co-authored with Joan Roughgarden)
  • The Cassandra Conference: Resources and the Human Predicament (1988)
  • The Birder's Handbook: A field Guide to the Natural History of North American Birds (1988, co-aurhored with David S. Dobkin and Darryl Wheye)
  • New World, New Mind[42] Moving Towards Conscious Evolution (1988, co-authored with Robert Ornstein)
  • The Population Explosion (1990, co-authored with Anne Ehrlich)
  • Healing the Planet: Strategies for Resolving the Environmental Crisis (1991, co-authored with Anne Ehrlich)
  • Birds in Jeopardy: The Imperiled and Extinct Birds of the United States and Canada, Including Hawaii and Puerto Rico (1992, co-authored with David S. Dobkin and Darryl Wheye)
  • The Stork and the Plow : The Equity Answer to the Human Dilemma (1995, co-authored with Anne Ehrlich and Gretchen C. Daily)
  • A World of Wounds: Ecologists and the Human Dilemma (1997)
  • Betrayal of Science and Reason: How Anti-Environment Rhetoric Threatens Our Future (1998, co-authored with Anne Ehrlich)
  • Human Natures: Genes, Cultures, and the Human Prospect (2002)
  • One With Nineveh: Politics, Consumption, and the Human Future (2004, co-authored with Anne Ehrlich)
  • On the Wings of Checkerspots: A Model System for Population Biology (2004, edited volume, co-edited with Ilkka Hanski)
  • The Dominant Animal: Human Evolution and the Environment (2008, co-authored with Anne Ehrlich)
  • Humanity on a Tightrope: Thoughts on Empathy, Family, and Big Changes for a Viable Future (2010, co-authored with Robert E. Ornstein) ISBN 978-1-4422-0648-9

See also

Notes

  1. ^ The contest occurred in the pages of Social Science Quarterly,[citation needed] where Simon challenged Ehrlich to put his money where his mouth was. In response to Ehrlich's published claim that "If I were a gambler, I would take even money that England will not exist in the year 2000"—a proposition Simon regarded as too silly to bother with—Simon countered with "a public offer to stake US$10,000 ... on my belief that the cost of non-government-controlled raw materials (including grain and oil) will not rise in the long run."[citation needed]

References

  1. ^ a b Professor Paul R. Ehrlich ForMemRS, The Royal Society, retrieved September 26, 2012.
  2. ^ Lewis, J. "Biologist Paul R. Ehrlich. Six billion and counting., Scientific American, October 2000, pages 30, 32.
  3. ^ Mieszkowski, Katharine (2008-09-17). "Do we need population control?". Salon.com. Retrieved 2012-09-27.
  4. ^ a b Leaders from the 1960s: A Biographical Sourcebook of American Activism - Google Books. Books.google.ca. 1932-05-29. Retrieved 2012-09-27.
  5. ^ a b c d e Tierney, John (December 2, 1990). "Betting on the Planet". The New York Times. Retrieved September 26, 2012.
  6. ^ Phillip Adams (19). "PAUL EHRLICH". Radio National. ABC. Retrieved 4 March 2013. {{cite web}}: Check date values in: |date= and |year= / |date= mismatch (help); Unknown parameter |coauthors= ignored (|author= suggested) (help); Unknown parameter |month= ignored (help)
  7. ^ a b Paul R. Ehrlich (2001). "PAUL R. EHRLICH" (PDF). Paul R. Ehrlich Resume. Stanford University. Retrieved 4 March 2013.
  8. ^ "Paul R. Ehrlich". Center for Conservation Biology – Department of Biology. Stanford University. 2013. Retrieved 4 March 2013.
  9. ^ a b Tom Turner (2011). "Story: Paul Ehrlich, the Vindication of a Public Scholar". Spot.us (first published by The Earth Island Journal). American Public Media. Retrieved 4 March 2013.
  10. ^ a b c Paul R. Ehrlich; Anne H. Ehrlich (2009). "The Population Bomb Revisited" (PDF). Electronic Journal of Sustainable Development. 1(3): 63–71. Retrieved September 26, 2012.
  11. ^ a b Pierre Desrochers (14). "The Intellectual Roots of Paul Ehrlich's The Population Bomb (and the pre-prehistory of climate alarmism)". MasterResource. MasterResource. Retrieved 4 March 2013. {{cite web}}: Check date values in: |date= and |year= / |date= mismatch (help); Unknown parameter |month= ignored (help)
  12. ^ a b c d Dan Gardner (2010). Future Babble: Why Expert Predictions Fail – and Why We Believe Them Anyway. Toronto: McClelland and Stewart.
  13. ^ a b c Ehrlich, Paul R. (1968). The Population Bomb. Ballantine Books.
  14. ^ a b c Bjørn Lomborg (2002). The skeptical environmentalist: measuring the real state of the world. Cambridge University Press. p. 350. ISBN 978-0-521-01068-9.
  15. ^ "Glenn Beck claims science czar John Holdren proposed forced abortions and putting sterilants in the drinking water to control population". Politifact.com. July 22, 2009. Retrieved 14 February 2011.
  16. ^ Katharine Mieszkowski (17 Sep 2008). "Do we need population control?". Salon.com.
  17. ^ Gretchen C. Daily, Anne H. Ehrlich, and Paul R. Ehrlich. Optimum Human Population Size. Population and Environment: A Journal of Interdisciplinary Studies Volume 15, Number 6, July 1994 01994 Human Sciences Press, Inc.
  18. ^ a b Paul Ehrlich (13). "When Paul's Said and Done". Internet Archive Wayback Machine. Grist Magazine, Inc. Archived from the original on 15 November 2004. Retrieved 4 March 2013. {{cite web}}: Check date values in: |date= and |year= / |date= mismatch (help); Unknown parameter |month= ignored (help)
  19. ^ a b c d Ronald Bailey (30). "Cracked Crystal Ball: Environmental Catastrophe Edition". reason.com – Free minds and free markets. Reason Foundation. Retrieved 4 March 2013. {{cite web}}: Check date values in: |date= and |year= / |date= mismatch (help); Unknown parameter |month= ignored (help)
  20. ^ Behind the Numbers: The PRB blog on population, health, and the environment (5 November 2008). "In Defense of Paul Ehrlich". Retrieved 10 February 2011.{{cite web}}: CS1 maint: multiple names: authors list (link)
  21. ^ http://www.washingtonpost.com/wp-srv/aponline/19991012/aponline181217_000.htm
  22. ^ Barry Commoner (May 1972). "A Bulletin Dialogue: on "The Closing Circle" — Response". Bulletin of the Atomic Scientists: 17–56.
  23. ^ Family Medicine Directory, Lara Knudsen, Wisc.edu
  24. ^ a b Knudsen, Lara "Reproductive Rights in a Global Context:South Africa, Uganda, Peru, Denmark, United States, Vietnam, Jordan", Vanderbilt University Press, 2006, pages 2-4 ISBN 0-8265-1528-2, ISBN 978-0-8265-1528-5
  25. ^ Karl Marx; Friedrich Engels (1971). Marx and Engels on the population bomb: selections from the writings of Marx and Engels dealing with the theories of Thomas Robert Malthus. Ramparts Press. Retrieved 4 March 2013.
  26. ^ Barry Commoner (May 1972). "A Bulletin Dialogue: on "The Closing Circle" — Response". Bulletin of the Atomic Scientists: 17–56. Population control (as distinct from voluntary, self-initiated control of fertility), no matter how disguised, involves some measure of political repression, and would burden the poor nations with the social cost of a situation — overpopulation — which is the current outcome of their previous exploitation, as colonies, by the wealthy nations.
  27. ^ Paul Ehrlich and Shirley Feldman (1978). The Race Bomb. Ballantine Books.
  28. ^ Simon, JL (June 27, 1980). "Resources, Population, Environment: An Oversupply of False Bad News". Science. 208 (4451): 1431–1437. doi:10.1126/science.7384784. JSTOR 1684670. PMID 7384784.
  29. ^ Simon Julian (1998). The Ultimate Resource II. Princeton University Press. Ehrlich and I have never debated face to face. He says that he has refused because I am a "fringe character".
  30. ^ Bjørn Lomborg (2002). The skeptical environmentalist: measuring the real state of the world. Cambridge University Press. p. 30. ISBN 978-0-521-01068-9.
  31. ^ Colin Fraser (3 February 2008). "Green revolution could still blow up in our face". The Age. Fairfax Media. Retrieved 4 March 2013.
  32. ^ Ehrlich, Paul and Anne (2004). One with Nineveh:politics, consumption, and the human future. Island Press.
  33. ^ Patt Morrison (12 February 2011). "Paul R. Ehrlich: Saving Earth". Los Angeles Times. Retrieved 4 March 2013. Consumption is equally important. I'd think the biggest problem is figuring out what to do on consumption. We don't have any consumption condoms.
  34. ^ Cristina Luiggi (1). "Still Ticking". The Scientist. LabX Media Group. Retrieved 4 March 2013. {{cite web}}: Check date values in: |date= and |year= / |date= mismatch (help); Unknown parameter |month= ignored (help)
  35. ^ Ehrlich, Paul R. (March 7, 2013). Proc. R. Soc. B. 280 (1754). doi:10.1098/rspb.2012.2845 http://rspb.royalsocietypublishing.org/content/280/1754/20122845.full. Retrieved January 27, 2013. {{cite journal}}: Missing or empty |title= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  36. ^ Hall, Eleanor (31 October 2011). "Population analyst warns of catastrophe". The World Today. Retrieved 31 October 2011.
  37. ^ "Longterm studies of the Bay checkerspot butterfly and feasibility of reintroduction".
  38. ^ Verity Edwards (4 March 2013). "Population theorist stands by his beliefs". The Australian. Retrieved 4 March 2013.
  39. ^ "'True Zionists should have small families' suggests Paul Ehrlich, 40 years after writing 'The Population Bomb'".
  40. ^ "Whitney R. Harris World Ecology Center: Dr. Paul Ehrlich". icte.umsl.edu. Retrieved 2010-05-21.
  41. ^ "The Heinz Awards, Paul and Anne Ehrlich profile". Heinzawards.net. Retrieved 2012-05-20.
  42. ^ "New World New Mind - Pdf Edition". Ishkbooks.com. Retrieved 2012-05-24.

Further reading

  • Ehrlich P. R. (2010) "The MAHB, the Culture Gap, and Some Really Inconvenient Truths". PLoS Biology 8(4): e1000330. doi:10.1371/journal.pbio.1000330
  • Robertson, Thomas. (2012) The Malthusian Moment: Global Population Growth and the Birth of American Environmentalism. Rutgers University Press.
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