John D. Rockefeller

John Davison Rockefeller Sr. was an American business magnate and philanthropist. He was one of the wealthiest Americans of all time and one of the richest people in modern history. Rockefeller was born into a large family in Upstate New York who moved several times before eventually settling in Cleveland. He became an assistant bookkeeper at age 16 and went into several business partnerships beginning at age 20, concentrating his business on oil refining.