Rachel Carson alerted the world to the dangers of pollution with the publication of her book Silent Spring in 1962, and in the process, she helped to launch the environmental movement. My guest, Paul Ehrlich, alerted the world to the dangers of human population growth and resource consumption with the publication of his book The Population Bomb in 1968, and in the process, he accelerated the environmental movement. He has played a major role in that movement ever since, authoring dozens of influential books and many more articles. Ehrlich received a bachelor’s degree from the University of Pennsylvania in 1953 and a PhD from the University of Kansas in 1957. He has been a professor at Stanford University since 1959, where he is the president of the Center for Conservation Biology. He is the recipient of numerous environmental prizes, such as a MacArthur Fellowship, the John Muir Award of the Sierra Club, the Tyler Prize for Environmental Achievement, the Blue Planet Prize, and the Eminent Ecologist Award of the Ecological Society of America. Ehrlich is a fellow of the American Association for the Advancement of Science, the American Academy of Arts and Sciences, and the American Philosophical Society; he is also a member of the US National Academy of Sciences.