First of all, "genetic interest" is a misleading term. You are selected to be a DNA replicator, and to be good at that function.
If we take the lion example, what if we have a pride where cub eating has become common next to a pride with no cub eating?
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All else equal, the non-cub eaters will outcompete and may completely displace the cub eaters. (let's assume they don't/can't interbreed).
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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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