Researchers have theoretically shown that microbes could influence their hosts to act altruistically. This influence could be surprisingly effective, with simulations showing that microbes may promote the evolution of altruistic behavior in a population to a greater extent than genetic factors do.

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Researchers have theoretically shown that microbes could influence their hosts to act altruistically. This influence could be surprisingly effective, with simulations showing that microbes may promote the evolution of altruistic behavior in a population to a greater extent than genetic factors do.