The 80 year old US nuclear umbrella is the only reason we do not have dozens of countries with nuclear weapons. Now because of Treason Trump's New World Disorder, we can expect a mad scramble of dozens of countries getting nukes in next few decades.
It has already started. Poland says it is going to get its own nukes now. It's a very wise move for Poland but the beginning a terrible disaster for planet Earth.
Here I was thinking that we'd get to the end of the decade before China invades Taiwan, but at the rate Trump is going China will probably be convinced that the US wouldn't intervene if they acted by next year.