Muhammad Ali

Muhammad Ali (1942–2016), born Cassius Clay, was an American heavyweight boxer who won the world title three times. Known for his speed, footwork, and showmanship, he was also a prominent voice of the civil-rights era — most notably refusing induction into the U.S. military in 1967, a stand that cost him his title and nearly four years of his career before the Supreme Court overturned his conviction in 1971.