Not the nukes. The Bretton Woods principles. It was not a kumbayah exchange of platitudes. It was an agreement to let things be settled in the free market.
Want more oil from Nigeria? Offer them more money than the other buyers. Want to fish the waters around Tuvalu? Radio them and offer more money. Want Congolese cobalt? Same idea.
This was the brainchild of John Maynard Keynes, not Ayn Rand. It was not a matter of market fetishism. It was based on the sensible idea that the market place is a better way to settle these things than the battlefield, something even a Marxist should be willing to admit.
That could have brought us to a world wide peace in 1945, but only the First World went along with this idea. The Second World rallied around endless revolution and war until we get a worker's paradise. And the Third World tried to stay out altogether. (Reminder: by the original definition, Switzerland was in the Third World).
We had another chance in 1989. And we blew it.
Now we can try again.