How a simple mathematic formula is starting to explain the bizarre prevalence of altruism in society

Why do humans cooperate in things as diverse as environment conservation or the creation of fairer societies, even when they don’t receive anything in exchange or, worst, they might even be penalized?

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<p><a href="http://www.physorg.com/news135580478.html">How a simple mathematic formula is starting to explain the bizarre prevalence of altruism in society</a></p> <p>Why do humans cooperate in things as diverse as environment conservation or the creation of fairer societies, even when they don’t receive anything in exchange or, worst, they might even be penalized?</p>