First published in 1968, Yanomamö: The Fierce People is arguably the best selling anthropology textbook of all time (move over Margaret Mead’s Coming of Age in Samoa). But Chagnon’s career has been as tumultuous as it has been epic. For decades his peers hotly debated his view that humans had, as he describes it, an "evolved nature in addition to a learned nature." Then a book released in 2000, Darkness in El Dorado: How Scientists and Journalists Devastated the Amazon, by Patrick Tierney, turned those academic skirmishes into all-out war on Chagnon and his career.