Watch full movie online. The study of crazy brilliance and flamboyant sincerity. a.k.a. Cassius Clay presents a fascinating look at the incredible life and achievements of one of the most courageous, outspoken and charismatic figures of boxing: Muhammad Ali. Born Cassius Clay in 1942, Ali soon rose to become a renowned athlete, an articulate author and a compelling political; leader. Audacious, ambitious and totally fearless, Ali became a symbol of pride, a legend of hope and one of the most extraordinary cultural icons of the 20th century.