For most of us, just one of the following would be an achievement. He was them all.
- Royal Marine
Special Boat Service unit commander
Party Leader (respected across political lines)
Statesman and international negotiator
No doubt other stuff
At the recommendation of another forumite I happen to be reading my way through his military history output at the moment. Very well written and not just using others' material - he went to primary sources.
77 was way too young.