What is the origin of altruistic?

Altruistic “unselfishly concerned for or devoted to the welfare of others” is formed from the altru- element in the term altruism plus the adjectival suffix -istic. Altruism, based on literary French autrui “others,” ultimately comes from Latin alter “(of two) the other,” which is also the source of English words such as alteration, altercation, and alternation, all of which involve a change into or an exchange with another entity, version, or individual. Altruistic behaviors, such as helping those in need, are often contrasted with egoistic behaviors, which prioritize a person’s own desires over the needs of others. While egoism, also known as egotism, is selfishness, altruism is selflessness. Altruistic was first recorded in English in the early 1850s.