“I shook up the world.” So says young gun and new heavyweight champion Cassius Clay (shortly to become Muhammad Ali) in those heady moments after his shock defeat of Sonny Liston in February 1964. But a meeting that same night with three African-American friends of equivalent status – superstar crooner Sam Cooke, NFL hero Jim Brown and controversial preacher Malcolm X – leads to soul-searching about the definition of success, and how best men like Clay can represent their community in a divided nation.

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