I can't say he was the greatest of all time , I think he gave himself that title.
What he did was change the heavyweight division. He was big and fast were as most were just big and heavy punchers.
The greatest would have been Rocky Marciano -retired undefeated..Mike Tyson in his prime, I feel, would have beaten Ali. Ali was a damn good boxer I'd say top 5 in his division.
As far as his Parkinson's he showed the world how devastating this disease can be. My dad had
it , he boxed also(and played semi-pro football), and I saw it take a great man and eat him alive.
mace