Eg suppose there is a gene that makes male lions kill offspring of other males. This behavior might not be good for lions in general.
So there may be a local competitive advantage to cub eating (or some other trait) but a larger scale competitive disadvantage.
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Whatever ends up winning is going to depend on the nature of the various kinds of competition. I think the process of non-cub eaters winning
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could reasonably be called "group selection"
End of conversation
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