References
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Moore, George E.1903. Principia Ethica. Cambridge : Cambridge Univ. Press.
Ruse, Michael. 1980. “Evolutionary Ethics: A Phoenix Arisen. Zygon, Journal of Religion and Science 21: 95–112.
Ruse, Michael. 1986. Taking Darwin Seriously: A Naturalist Approach to Philosophy. Oxford : Blackwell.
Williams, George C.1988. “Huxleys Evolution and Ethics in Sociobiological Perspective. Zygon: Journal of Religion mid Science 23:383–407.