a form of natural selection that favors altruistic behavior toward close relatives resulting in an increase in the altruistic individual's genetic contribution to the next generation.
Examples from the web for kin selection
Perhaps the biggest change that group selection brings to evolutionary theory is its implication for so-called kin selection.
Reciprocal altruism and kin selection are the two main theories.
British Dictionary definitions for kin selection
kin selection
noun
1.
(biology) natural selection resulting from altruistic behaviour by animals towards members of the same species, esp their offspring or other relatives