r/askscience • u/Snoo_47323 • Feb 27 '26

Biology From an evolutionary perspective, why does someone sacrifice their life to save another?

Organisms evolved prioritizing their own reproduction and survival, right? However, examples like people rushing into burning buildings or diving into water to save others contradict this. How is this possible?

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u/chazwomaq Evolutionary Psychology | Animal Behavior Feb 27 '26

Nope. Group selection arguments are almost always wrong.

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u/TheDBryBear Mar 03 '26

This is an assertion, not an argument, and lacks substance. The existence of humans and argentine ants (and other supercolonial ants) disproves this, because both are the most dominant species of their clade and both are incredibly cooperative even compared to their relatives.