Working over 40 years in the ancient, overall pristine rain forests of the Amazon has enabled pioneer Marc van Roosmalen, a Dutch/Brazilian primatologist, behavioral ecologist and rainforest specialist, to propound a revolutionary theory that applies to all social primates, including the human one Homo sapiens. In Man's Territorial Primate Factor Van Roosmalen explores why territorial social primates do represent the most colorful and species-rich group of mammals. To explain his theory to the general public, he takes the reader on an adventurous journey through the biological history of modern man, ever since the first humans did migrate 'Out-of-Africa', some 130,000 years ago. He has traced back the fate of a number of nations of modern man that, either survived the rule of "survival of the fittest social grouping , or got exterminated. In this book, he reveals the existence of "pur sang" Aborigene people he recently stumbled upon - tucked away in a remote corner of the Brazilian Amazon...