^I agree. Altruism exists because selfishness exists, and both are defined within a spectrum of human behavior. It's sort of meaningless imo to drag biology into this discussion and bring up the many ways that people might indirectly benefit from altruistic behavior. The fact is that anything that doesn't ultimately benefit your genes in some way won't evolve and so it's pointless to frame the question in that way. We originally defined these terms based on subjective human values, i.e. traits that we admire in other humans vs traits that we find distasteful. We shouldn't lose sight of that very basic dynamic.
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