A person who does a lot of work for a charity

A person, who does a lot of work for a charity is philanthropist (also: humanitarian, benefactor). The philanthropist help poor people, homeless people. Usually the philanthropist donates his money to some fund. "Philanthropy" in the translation from Greek means "love for people". The word "philanthropy" for the first time appeared in the tragedy of Aeschylus "Prometheus the Chained" to denote the divine help to people.