And then he was whupped by Joe Frazier in Mad Sq. Garden. Put on his ass, in fact.
Look, I admire Ali a lot -- esp his antiwar stance with so much at stake (tho I'm not crazy about how he snubbed Malcolm X in favor of Elijah Muhammad, right before X was iced). But Liston was a better fighter than you suggest, and one not need go into "animal" natures to appreciate that. Fact is, as fast as Ali was, he lacked a devastating blow. His fights with Frazier proved that. He could move, dodge and pepper his opponent with jabs and some decent hooks, but he was not a power fighter. He outwitted Foreman in Zaire, and barely outlasted Frazier in Manila. Ali was a smart and deft, but no powerhouse.
Dennis