Muhammad Ali was also a symbol of black protest, a cipher for the anti-Vietnam movement, a martyr (or traitor, depending on one’s perspective), a self-regarding braggart, and many more things beside. While there have been several sports icons, none have approached Ali in terms of complexity, endowment and sheer potency.
Arundhati Roy on the wars of Indian state
But radical positions alone do not make you radical. They only show that you understand what the correct position is. You become radical only when you follow up on what you understand and, therefore, get involved in some way in organising people for a radical movement on the ground.