The talk proposes that humans have always lived in a “pluriverse” of many different real worlds, not just in a universe of one. It also considers how this proposal might change the way we think about the human past, present, and the future. Greg loves to share his fascination with the many different worlds that humans have inhabited. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx