and has suggested that since such behaviour favours the survival of the group and not of the individual it must have evolved by a process of group selection. It is the purpose of this ...

In this paper, I show that this debate can be resolved by constructing a general version of Hamilton’s rule, which allows for a large variety of ways in which the fitness of an individual can depend ...

This type of unselfish behaviour is called altruism. Altruism may be common between individuals who are related (kin). The donor will benefit in terms of the increased chances of survival of ...

my own grasp of the genetical theory of natural selection, on the other hand, no doubt looks still more halting and inept to him. We ought to enlarge the area of common ground, but that is too big ...