Carranza, J. (2010). Sexual selection and the evolution of evolutionary theories. Animal Behaviour 79: e5-e6.
Evolutionary theory has experienced big changes since Darwin published his book on the origin of species (Darwin 1859). New elements such as the development of genetic theory (Fisher 1930; Wright 1931; Haldane 1932; Dobzhansky 1937 ), recognition of selection at the level of genes (Williams 1966) and kin selection (Hamilton 1964) have been incorporated to refine and adapt the new natural selection theory. As a consequence, when we now use the term natural selection in an academic context we refer to processes resulting in changes in gene frequencies rather than ‘preservation of favoured races in the struggle for life’ or ‘survival of the fittest’.