A new study of 100 hunter-gatherers cultures suggests team-based play fighting, found only in humans, builds up the skills used in lethal raiding, and team sports may have evolved because it improved the coordination and motor skills used in warfare.

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A new study of 100 hunter-gatherers cultures suggests team-based play fighting, found only in humans, builds up the skills used in lethal raiding, and team sports may have evolved because it improved the coordination and motor skills used in warfare.