I will be a little surprised if Europe turns out to the home of this cultural revolution. For starters, Europe is better researched only because it has been explored for so much longer. It is only comparatively recently that we have been able to explore Africa, and Africa is a far larger continent with lots of remote and inaccessible (to us) regions that may harbor extensive evidence of human origins.
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I doubt that it will be traced to one place in particular. It may have been a natural product of time and evolution, cropping up in different ways in different parts of the world over millennia.