Humans, and many other species, have a tendency to cooperate and help each other. But how does such behaviour evolve? Some new computer simulations provide a plausible answer.
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Sigmund, K., Nowak, M. Tides of tolerance. Nature 414, 403–405 (2001). https://doi.org/10.1038/35106672
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DOI: https://doi.org/10.1038/35106672
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