nukes is the best things that happened and the reason why there is not world wars anymore. You can make an argument that Izrael should give 3 or 4 warheads to Iran.
It would de-escalate the proxy wars.
Nukes have been around for less than a century, a blink of an eye in historical terms, and have already come close to obliterating the world multiple times. It only takes a single war to undue millennia of progress.
There have been several proxy wars between USSR and USA during the Cold War.