Monk Of Reason
༼ つ ◕_◕ ༽つ
Just looked it up and basically the concept is that we inter-bred with the different other hominids that existed to give us more expanded roots. Though homo-sapiens themselves actually developed in Africa. However we have bits of other hominids in our blood. Neanderthal being the most prominent.I'm not too familiar with either. The polycentric theory of social evolution is discussed by Herbert Spencer, and the polycentric theory of biological evolution by Franz Weidenreich. The one from Franz proposes a split from Homo erectus and possible interbreeding afterwards. Not sure if this could explain or take into account such interbreeding as between Homo sapiens sapiens and Homo sapiens neanderthalensis.
It isn't anywhere near as widely accepted as the OOA model but its still a legitimate theory.