Group+Selection - R. Trivers Anthro 204 Spring 2011 Group...

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R. Trivers Anthro 204 Spring 2011 Group Selection 1--What is it? Group selection refers to selection between different groups, favoring what is best for each group. In this view, natural selection favors your acting for the benefit of the group--not for your own immediate reproductive gain. It imagines that traits that harm your own reproductive success may, nonetheless, spread in nature if they give a large enough benefit to the group. Perhaps your failure now to reproduce will prevent your local population later from going extinct due to over-population. The problem is that it is the reproducers in your group who have enjoyed a net gain from your non-reproduction. Your genes for non-reproduction are going down in number, while others in the group benefit. Unless they are related to you, it is difficult to see how your genes are recouping their losses. 2--What difference does it make? The notion that individuals evolve to act for the benefit of the group or the species--instead of the individual itself--does not make much difference where non-social
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This note was uploaded on 02/08/2011 for the course SOCIOLOGY 204 taught by Professor Trivers during the Spring '11 term at Rutgers.

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Group+Selection - R. Trivers Anthro 204 Spring 2011 Group...

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