Oppenheimer writes that there was only one migration out of Africa that contributed to the peopling of the rest of the world . Oppenheimer believes that anatomically modern humans crossed the Red Sea from the Horn of Africa and followed the " southern coastal route " once in Asia . Thus Oppenheimer is opposed to the theory that there was another out of Africa migration using a northern route along the Nile and into the Levant as suggested by Lahr and Foley 1994 . The book also supports the theory that modern humans were in South Asia during the Toba catastrophe
Toba catastrophe
Toba catastrophe theory
The Real Eve