Kindness is in our genes: How desire to do good deeds is hard-wired into us by evolution
Daily Mail:
Tipping waiters is hard-wired into our brains, according to scientists.
Theories of evolution suggest we should incur a cost only if there’s a prospect of receiving something in return, but researchers say generosity evolved from simple co-operation.
They believe humans have evolved to think it’s better to take the risk of being generous and getting nothing in return than destroying a potentially beneficial future relationship by being stingy.
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