Not a game-theoretic name, but in evolutionary theory such behaviours with similar outcomes are called "kin selection" or "group selection". IMHO, the former is

Not a game-theoretic name, but in evolutionary theory such behaviours with similar outcomes are called "kin selection" or "group selection". IMHO, the former is more on the point. http://en.wikipedia.org/wiki/Kin_selection http://en.wikipedia.org/wiki/Kin_selection