Paul Ehrlich reflects on his extensive career, including what he got wrong in The Population Bomb, the challenges of population growth, and the critical issue of biodiversity loss. He also discusses the importance of education and wealth in promoting environmental stewardship, the role of nuclear power, and the ethical dilemmas of cloning extinct species.

Paul Ehrlich is Professor Emeritus of Population Studies in the Department of Biology and the president of the Center for Conservation Biology at Stanford University. He is the author of The Population Bomb. His new book is Before They Vanish: Saving Nature's Populations—and Ourselves.