Ali becomes the world's first three-time heavyweight champion who travels the world as a goodwill ambassador, philanthropist, and activist.

Muhammad Ali was a transcendent figure in American history and perhaps the most recognized person in the world over the past 50 years. Exploring Ali's challenges, confrontations, comebacks and triumphs through recordings of his own voice, this two-part HBO Documentary Films presentation paints an intimate portrait of a man who was a beacon of hope for oppressed people around the world and, in his later years, was recognized as a global citizen and a symbol of humanity and understanding.