血縁選択説
Kin selection refers to evolutionary strategies where an individual acts to favor the reproductive success of relatives, or kin, even if the action incurs some cost to the organism's own survival and ability to procreate. John Maynard Smith coined the term in 1964, although the concept was referred to by Charles Darwin who cited that helping relatives would be favored by group selection. Mathematical descriptions of kin selection were initially offered by R. A. Fisher in 1930 and J. B. S. Haldane in 1932. and 1955. W. D. Hamilton popularized the concept later, including the mathematical treatment by George Price in 1963 and 1964.