MAREK KOHN is a science writer on evolution, biology and society. His first two books were on drugs, their cultural history, and their politics. He is the author of seven books and hundreds of articles. He holds an undergraduate degree in neurobiology from the University of Sussex, a PhD from the University of Brighton and has held fellowships at both schools. His writing has appeared in The Independent, New Scientist, Prospect, Financial Times, and The Guardian, and he writes frequently for the New Statesman.