To be honest the world is likely safer because of the nuclear deterrent.

If Pakistan and India both didn't have nuclear weapons you can rest assured they would've long fought an endless stream of wars with tens and tens of millions. They hate each other.

The nuclear arms re-proliferation that comes along with a multi-polar world raises the risk of use of nuclear weapons considerably. Even in traditionally anti-nuclear Japan, some politicians are broaching the idea of acquiring nuclear arms. That very much makes a difference.