Before his third fight with Frazier, Ali was at his most elevated, symbolically as well as in the ring. Hard to imagine when these days he elicits universal reverence, back then he was a figure who divided America, as loathed as he was admired. At the time he was taking his lead from the Nation of Islam, which, in its espousal of a black separatism, found its politics dovetailing with the cross-burning lynch mob out on the political boondocks. Ali was by far the organisation's most prominent cipher.