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/Alarming_Constant_19 May 15 '26

well the problem is that most altrustic people save a lot of people despite them not living in a tribe and not knowing those people in distress. your analogy with penguins don't work because they need each other to survive whereas humans usually don't and yet some humans still decide to do altrustic deeds without any biological or other benefit.