Recently, however, a team of scientists at UC Santa Barbara conducted a series of computer simulations designed to test whether it was really true that evolution would select against generosity in situations where there is no future payoff. Their work surprisingly shows that generosity — acting to help others in the absence of foreseeable gains — emerges naturally from the evolution of cooperation. This means that human generosity is likely to rest on more than social pressure, and is instead built in to human nature.
Don’t Darwinists ever get tired of defending this fertilizer? Anyone who has worked as a waitress knows that that is not true. People tip according to what they have been taught.
Hat tip: Pos-Darwinista