altruism
//ˈæl.tɹu.ɪ.zəm//
Noun
1
The selfless concern for the well-being and welfare of others, often involving personal sacrifice.
Her altruism led her to donate most of her savings to charity.
2
Behavior by an animal that benefits another at its own expense, especially in evolutionary biology.
Worker bees display altruism by sacrificing their lives to protect the hive.