Anthropology Profs. Milford Wolpoff and Rachel Caspari, who spoke at Rackham West Conference Hall, are leading the increasingly popular charge against the Out of Africa hypothesis, in an intellectual clash that has become anthropology's equivalent of the Battle of Waterloo. The book "Race and Human Evolution: A Fatal Attraction," which Wolpoff and Caspari co-authored, discusses an alternative to Out of Africa known as the Multiregional Evolution (MRE) hypothesis. The theory states that the races of modern humans evolved within their respective continents at the same time.