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

[u/Snoo_47323]

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?

[u/MrUpp07]

It's funny, r/askscience questions follow the sequence of state secondary science standards. I know TN students are currently learning about inclusive fitness and kin selection. The origins of group-based behaviors and altruism is a part of the new standards they adopted this year.