Why it pays to be choosy

Cooperative behaviour is common in many species, including humans. Given that cooperative individuals can often be exploited, it is not immediately clear why such behaviour has evolved.

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<p><a href="http://www.physorg.com/news119107348.html">Why it pays to be choosy</a></p> <p>Cooperative behaviour is common in many species, including humans. Given that cooperative individuals can often be exploited, it is not immediately clear why such behaviour has evolved.</p>