Nelson Mandela is a good one. I also think Gandhi. His independence movement is one of the most amazing and powerful in human history, and his principles of non-violent resistance and non-cooperation have been studied and used all over the world, including by Nelson Mandela.
King Henry I set into motion binding measures on the monarchy in the Anglo-Saxon tradition by proclaiming his Charter of Liberties which led to the Magna Charta... the Constitution of the United States as well as those governing charters throughout the commonwealth of nations.
Well, in NZ most people tend to think David Lange was awesome for standing up to US regarding our nuclear free policy.
Overhere I would say Nelson Mandela. He helped people reconcile their differences.
I love ghandi and his views on things.
humanity = sir winston churchill