Some researchers say the carnage found in the fossil record is proof violence is innate and inevitable. But researchers in Japan say the peaceful hunter-gatherers of the islands' Jomon period, from 13,000 to 800 B.C., offer a counter-narrative.

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Some researchers say the carnage found in the fossil record is proof violence is innate and inevitable. But researchers in Japan say the peaceful hunter-gatherers of the islands' Jomon period, from 13,000 to 800 B.C., offer a counter-narrative.