Keynes saw what happened after the First World War and correctly predicted the the unbalanced Versailles Agreement would lead to war.
After that war (World War 2) Keynes chaired the talks that led to an enlightened agreement that led to peace in Europe.
What about the peace there has been after the fall of the USSR. It seems more like a return to 1919 and all the inherent dangers. Now, despite partial nuclear disarmament, the protagonists ( Russia and the USA) have nuclear weapons sufficient to destroy the world many times over.