{"id":342252,"date":"2026-03-22T13:16:30","date_gmt":"2026-03-22T13:16:30","guid":{"rendered":"https:\/\/www.newsbeep.com\/nz\/342252\/"},"modified":"2026-03-22T13:16:30","modified_gmt":"2026-03-22T13:16:30","slug":"paul-ehrlich-often-called-alarmist-for-dire-warnings-about-human-harms-to-the-earth-believed-scientists-had-a-responsibility-to-speak-out","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/nz\/342252\/","title":{"rendered":"Paul Ehrlich, often called alarmist for dire warnings about human harms to the Earth, believed scientists had a responsibility to speak out"},"content":{"rendered":"

Stanford University biologist Paul Ehrlich<\/a>, who died March 13, 2026<\/a>, in Palo Alto, California, was a scientific crusader whose dire predictions about population growth, world hunger and environmental collapse made headlines and sparked controversy for decades. <\/p>\n

Sometimes called a \u201cprophet of doom<\/a>\u201d by his detractors, Ehrlich was among the most public figures of the environmental movement. He was admired and often honored for his prophetic warnings<\/a>. But he was also excoriated when his worst predictions failed to come true<\/a>. <\/p>\n

Ehrlich founded Stanford\u2019s Center for Nature and Society<\/a> in 1984 and wrote more than 40 books and over 1,100 scientific articles<\/a> on ecology, the environment and population dynamics. He is best known outside of academia for writing \u201cThe Population Bomb<\/a>\u201d in 1968, along with his wife, conservation biologist Anne H. Erhlich<\/a>, who survives him.<\/p>\n

\"A<\/a><\/p>\n

Paul Ehrlich and his wife, biologist Anne Ehrlich, arrive in New Zealand for a series of talks on population on Aug. 22, 1971.
\n George Lipman\/Fairfax Media via Getty Images.<\/a><\/p>\n

The book became a bestseller that was reprinted more than 20 times<\/a> and translated into multiple languages. It starkly predicted that population growth would exhaust Earth\u2019s resources<\/a>, leading to wars and social collapse. <\/p>\n

Ultimately, the book both popularized and polarized the U.S. environmental movement. <\/p>\n

As a scholar of communications and environmental history<\/a>, I see Ehrlich\u2019s difficult fight for the environment as emblematic of the vast chasm between science on one side and political culture influenced by the mass media on the other side.<\/p>\n

And I see Ehrlich\u2019s passing \u2013 along with others of his generation, such as Carl Sagan<\/a>, E.O. Wilson<\/a> and Jane Goodall<\/a> \u2013 as a loss for a world that needs visionaries and public scientists now more than ever. Public understanding of science and technology is critical for political discussion, for environmental preservation and, in the words of British physical chemist C.P. Snow<\/a>, for the sake of \u201cthe poor who needn\u2019t be poor<\/a> if there is intelligence in the world.\u201d <\/p>\n

The battle over the book<\/p>\n

\u201cThe Population Bomb\u201d opened with a verbal blast: \u201cThe battle to feed all of humanity is over.\u201d And because the \u201cstork had passed the plow,\u201d the Ehrlichs wrote, \u201chundreds of millions of people are going to starve to death.\u201d Overpopulated India was doomed, they contended, and England \u201cwill not exist in the year 2000,\u201d following a massive social and environmental breakdown.<\/p>\n

These stark warnings, while overstated, seemed at least plausible at the time. Older scientists, including Snow and oceanographer Roger Revelle<\/a>, had also warned about population growth<\/a> overtaking food production<\/a>. <\/p>\n

The Ehrlichs were influenced<\/a> by books such as the 1948 bestsellers \u201cRoad to Survival<\/a>,\u201d by ecologist William Vogt<\/a>, and \u201cOur Plundered Planet<\/a>,\u201d by paleontologist Henry Fairfield Osborn<\/a>. All of these thinkers owed a debt to the original Cassandra of population catastrophe, English economist Thomas Malthus<\/a>, whose 1798 book \u201cAn Essay on the Principle of Population<\/a>\u201d warned that the world\u2019s population would inevitably outstrip its food supply. <\/p>\n

Even worse, Malthus predicted, efforts to produce more food would simply continue the cycle of famine and poverty. However, new crops and agricultural techniques forestalled Malthus\u2019 catastrophe<\/a> in the 19th century. As a result, the term \u201cMalthusian\u201d came to signify overly pessimistic views<\/a> about complex social problems. <\/p>\n

Paul Ehrlich appears on \u2018The Tonight Show\u2019 with host Johnny Carson on Jan. 31, 1980.<\/p>\n

A different sort of Malthusian<\/p>\n

Handsome and well-spoken, Ehrlich captured the public imagination through news articles, public lectures and television appearances. \u201cThe Population Bomb\u201d launched him into the center of a raging global debate over environment and conservation. He appeared as a guest on \u201cThe Tonight Show\u201d with Johnny Carson more than 20 times<\/a> in the 1970s and early \u201980s. <\/p>\n

This wasn\u2019t the typical public profile for a biology professor. As New York Times reporter Robert Reinhold observed in 1969<\/a>, Ehrlich was \u201crepresentative, perhaps, of a growing new breed of scientists who are willing to get involved in the unscientific and sometimes rough business of crusading in public against such things as DDT, highway building and population growth.\u201d <\/p>\n

Not all environmental advocates agreed with Ehrlich\u2019s view that population growth was the critical threat. Another prominent biologist, Barry Commoner<\/a>, saw faulty technology<\/a> as the primary source of environmental problems. <\/p>\n

In fairness, Ehrlich and his frequent collaborator, physicist John Holdren<\/a>, saw technology and population as cofactors in a complex social problem<\/a>, which they summarized with the equation I = P x A x T, or Impact equals Population times Affluence times Technology. Put another way, population growth, wealth and the types of technologies people chose to use all contributed to human impacts on the environment. <\/p>\n

The debate between Ehrlich and Commoner perplexed some people, but it showed two different approaches to environmental policy. With Commoner\u2019s approach, technological problems such as toxic waste and nuclear radiation, would be solved through cleanups and improved processes. <\/p>\n

Ehrlich said reducing overconsumption and addressing population growth would also help ease these challenges. To slow population growth, Ehrlich called for promoting contraception and increasing access to abortions<\/a>, and perhaps even resorting to coercive methods, such as forced sterilization<\/a>.<\/p>\n

By the 1970s, a focus on population growth had become widely accepted. The first United Nations Conference on the Human Environment<\/a>, held in Stockholm in 1972, ranked population growth alongside pollution and underdevelopment as the top action items on the global agenda. Later that year, a prominent European think tank, the Club of Rome, echoed Ehrlich\u2019s warnings in its widely circulated Limits to Growth<\/a> report. <\/p>\n

Scarcity or abundance?<\/p>\n

World population continued to grow through the 1970s and \u201980s, but the impacts that Ehrlich predicted did not occur. This was largely due to the Green Revolution<\/a>, a broad campaign by governments and research institutes to provide high-yield varieties of wheat and rice, along with pesticides and mechanized agriculture, to developing countries. These new tools increased harvests and dramatically reduced the risk of famine<\/a>. <\/p>\n

Agricultural scientist Norman Borlaug<\/a>, a leader of this effort, received the Nobel Peace Prize in 1970. Borlaug made a point of agreeing with Ehrlich in his Nobel lecture, saying the Green Revolution was a temporary reprieve and that population control was also essential<\/a> in the ongoing battle against hunger. <\/p>\n

Conservative economists and scientists weren\u2019t persuaded. One prominent critic, academic economist Julian Simon<\/a>, argued for what came to be called the cornucopian view<\/a>, which held that the only limits to growth were imagination and ingenuity. Simon said the Earth had infinite capacity to provide materials and that humans would constantly innovate and find new ways to use them<\/a>.<\/p>\n

In 1980 Simon publicly bet Ehrlich<\/a> that prices of five important industrial raw materials \u2013 copper, nickel, tungsten, chromium and tin \u2013 would fall rather than rise over the next decade. Ehrlich said he would have preferred some environmental measure rather than metals, but he said resources would become scarce and prices would rise<\/a>. <\/p>\n

Simon, on the other hand, argued that markets and new technologies would drive prices down. Ultimately, although prices for these five metals had risen during the preceding decades and would also rise during the 1990s, they declined between 1980 and 1990<\/a>. Simon won the bet, and Ehrlich wrote him a check in 1990<\/a> for US$576.07, the difference between the 1980 and 1990 prices.<\/p>\n

Metals prices may not have been a good proxy for the issues that Paul Ehrlich and Julian Simon sought to capture in their famous bet.<\/p>\n

A matter of when<\/p>\n

After the catastrophes that Ehrlich predicted in \u201cThe Population Bomb\u201d failed to occur, many critics had a laugh at his expense. \u201cAs you may have noticed, England is still with us. So is India,\u201d chuckled New York Times columnist Clyde Haberman<\/a> in 2015.<\/p>\n

\u201cPaul Ehrlich is a misanthrope who\u2019d make you apply for a government permit to have a baby if he could,\u201d wrote Chelsea Follett of the libertarian Cato Institute<\/a> in 2023. <\/p>\n

Ehrlich and his supporters replied that while the Green Revolution might have forestalled widespread famine, human impacts were weighing ever more heavily on the planet. Taking problems such as climate change and toxic pollution into account, Ehrlich asserted in 2009 that \u201cThe Population Bomb\u201d had been \u201cway too optimistic<\/a>.\u201d<\/p>\n

In his 2023 memoir, \u201cLife<\/a>,\u201d Ehrlich expressed deep gratitude for a 70-year career in science. However, he was frustrated over what he saw as the inability of science to penetrate America\u2019s stubbornly unscientific political culture. He was also saddened that the environmental movement was failing to effectively oppose \u201cthe forces that pose existential threats to civilization.\u201d Throughout his career as a public scholar, Ehrlich was never afraid to look into the abyss.<\/p>\n

This article has been updated to correct the date of Ehrlich\u2019s death.<\/p>\n","protected":false},"excerpt":{"rendered":"Stanford University biologist Paul Ehrlich, who died March 13, 2026, in Palo Alto, California, was a scientific crusader…\n","protected":false},"author":2,"featured_media":342253,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[273,111,139,69,147],"class_list":["post-342252","post","type-post","status-publish","format-standard","has-post-thumbnail","category-environment","tag-environment","tag-new-zealand","tag-newzealand","tag-nz","tag-science"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/342252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/comments?post=342252"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/342252\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media\/342253"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media?parent=342252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/categories?post=342252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/tags?post=342252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}