https://youtu.be/HgCDsNbhjgU is a quick look at #WhatGregg'sUpTo (I made up that hashtag to remind myself and others to keep checking because Gregg's On A Roll!)
There were 'six simultaneous cradles of civilization' with all the amazing advances we'd assume one would need to succeed. Southwestern America and in the Mayan cradle of civilization are some of the places Gregg Braden will explore amazing theories.