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Altruism's Evolution

Published online by Cambridge University Press:  28 February 2024

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What can recent theories in evolutionary biology about the problem of altruism contribute to a Christian perspective on the nature of humanity?

Altruism is considered a ‘problem’ because Darwin’s theory of natural selection leads us to expect all organisms, including humans, to be selfish. According to the theory of natural selection those traits which we expect to see in the natural world are the ones which have conferred on their bearers the greatest reproductive success. As altruism means the giving of aid, a preliminary reading of Darwinism suggests that altruism poses a challenge to the whole theory of adaptation by natural selection. Sociobiology has a great deal to say about the evolution of altruism in non-humans. How far does the study of altruism in non-humans help us to understand altruism in us?

Sociobiological theories for the evolution of altruism Sociobiology, the systematic study of the biological basis of all social behaviour, dates as a named discipline from only 1975, when E.O. Wilson’s now much-discussed book, Sociobiology: The New Synthesis, was published. As altruism manifestly requires social behaviour—an organism cannot be altruistic on its own!—theories for the evolution of altruism lie at the centre of sociobiology.

The first biological explanation for altruism was, however, proposed by none other than Darwin himself. Having developed the theory of natural selection, Darwin went on to consider how the sterile castes in many social insects could have evolved. He realised that it might be argued that such castes could not have evolved by natural selection because the bearers of traits associated with sterility leave, by definition, no offspring, but he proposed that sterility in such circumstances could evolve by a process he termed ‘family selection’.

Type
Research Article
Copyright
Copyright © 1988 Provincial Council of the English Province of the Order of Preachers

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