Will We Be Visited by Aliens? and Can We Eradicate Genocide?

Jared Diamond looks to evolution for clues to the big questions of our era. This time he discusses space exploration and the discovery of habitable extrasolar planets, which hold the possibility of life. If aliens visited, would they come with friendly intentions? Then he explores our own species' shocking capacity for murder, war and genocide, and the "us vs them" mentality we share with other animals, including our cousins the chimpanzees.

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