What can you say about a man you disagreed with? That he had courage of conviction that earned him due respect! He was the greatest heavyweight world champion in living memory! And I liked him as a real man and a role model, who saved his fists for the ring and a matched opponent!
Alan B.

It was unfortunate that Ali's Parkinsons removed him from public life early - from about 50. It may have been Parkinsons that ended his life early.

For a boxer receiving many head blows Ali's Parkinsonian tremors and some other symptoms fell into line with https://en.wikipedia.org/wiki/Dementia_pugilistica#Symptoms

"The condition, which occurs in athletes having suffered repetitive blows to the head, manifests as dementia, or declining mental ability, problems with memory, dizzy spells or lack of balance to the point of not being able to walk under one's own power for a short time and or Parkinsonism, or tremors and lack of coordination."

There are one or two prominent politicians in Oz who may present the walk.