Paul Ehrlich is Bing Professor of Population Studies and President of the Center for Conservation Biology at Stanford University. He is the author of The Population Bomb, one of the first books to bring environmental science to the general public. He has given thousands of public lectures in the past 40 years. Ehrlich is author and coauthor of over 1000 scientific papers, books, and articles in the popular press covering a range of topics from the effects of crowding on people and how consumption destroys our life-support systems to the origins of religion and the ethics of the environments. Of his some 40 books, Human Natures and The Dominant Animal have brought home the seriousness of the mismatch between human behavior and the chances of a global collapse of civilization. He has given thousands of public lectures and appearances on the electronic media.