Kinship selection was always an inadequate explanation for animal behavior observed in the natural world. Relying solely on kin selection to explain the evolution of our consensus reality implicitly depends on making sweeping, ridiculous claims that a lot of really obvious phenomena (like fostering and adoption and homosexuality and cross-species altruism and so forth) are just aberrant behaviors, which do not really need to be accommodated or even comprehensively considered by evolutionary biologists.

The experimental colonies proved more successful if their docile-to-aggressive ratios matched that of the naturally occurring control colonies in the same areas, the researchers report online this week in Nature. The results provide an example of group selection, where individual traits evolve according to the needs of a group.

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Paywalled article at Nature here, popular treatment at Science here.