the principle or practice of unselfish concern for or devotion to the welfare of others ( opposed to egoism ).

Animal Behavior . behavior by an animal that may be to its disadvantage but that benefits others of its kind, as a warning cry that reveals the location of the caller to a predator.

noun

benevolence , charity , humanitarianism , kindness , magnanimity , philanthropy , public spirit , selflessness , social conscience , beneficence , benignancy , benignity , charitableness , goodwill , grace , kindheartedness , kindliness , generosity