Unit of selection and Confirmation of Evolutionary Theory" provides a basic "philosophical" introduction to the debate. Below, cases of selection at the genic, cellular, individual and group level from within the multi-level selection perspective are presented and discussed. George C. Williams in his influential book "Adaptation and Natural Selection" was one of the first to present a gene-centered view of evolution with the gene as the unit of selection, arguing that a unit of selection should exhibit a high degree of permanence. Richard Dawkins has written several books popularizing and expanding the idea. According to Dawkins, genes cause phenotypes and a gene is
The Selfish Genius entitled the "Dawkins Dogma" contains parts of the arguments put forward within the book. "The Selfish Genius" has been criticized in "The Economist" for failing to fully understand Dawkins' selfish gene metaphor, with the reviewer claiming Dawkins accommodates proposed alternative evolutionary mechanism Elsdon-Baker suggests within her own ideas. However a generally positive reception has been seen amongst proponents of group selection and Philip Ball wrote a largely positive review in "The Times" that acknowledges she is right to "call time on a Whiggish view of the history of evolution". "Popular Science" author Brian Clegg reviewed the book and described it