Besides Richard Dawkins and George C. Williams, other biologists and philosophers have expanded and refined the selfish-gene theory, such as John Maynard Smith, George R. Price, Robert Trivers, David Haig, Helena Cronin, David Hull, Philip Kitcher, and Daniel C. Dennett.
The El Salvador newspaper La Pagina, discussing the debate about a gay rights law, cited Cronin and Alfred Kinsey as authorities on the issues involved.
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