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This week Adam welcomes an author whose book blew his mind more than perhaps any other. Americans are typically taught that prior to the arrival of European settlers, indigenous communities were sparsely populated, lacked technology, and did little to shape the natural landscape. But as this week\u2019s guest Charles C. Mann\u2019s 1491 tells Adam, the most recent research reveals that the American indigenous civilizations were sophisticated, dynamic, and massively populated. Purchase his books 1491 and 1493 at http://factuallypod.com/books.\nLearn more about your ad choices. Visit megaphone.fm/adchoices\n\nSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.