Why are we altruistic? | Amanda Ridley | TEDxPerth
7 years ago
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[{"text":"Evolution rewards competition for resources and mates, yet acts of self-sacrifice, on first appearances, appear to disadvantage the\u00a0..."}]
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{"title":"Why are we altruistic? | Amanda Ridley | TEDxPerth by TEDx Talks 12,966 views 7 years ago 12 minutes, 49 seconds","duration":"12 minutes, 49 seconds"}