Muhammad Ali (born Cassius Marcellus Clay Jr.; January 17, 1942 – June 3, 2016) was an American professional boxer, activist, entertainer and philanthropist. Nicknamed The Greatest, he is widely regarded as one of the most significant and celebrated figures of the 20th century and as one of the greatest boxers of all time.
Ali's actions as a conscientious objector to the Vietnam War made him an icon for the larger counterculture generation, and he was a very high-profile figure of racial pride for African Americans during the civil rights movement and throughout his career. As a Muslim, Ali was initially affiliated with Elijah Muhammad's Nation of Islam (NOI). He later disavowed the NOI, adhering to Sunni Islam, and supporting racial integration like his former mentor Malcolm X.