Unfortunately it may be impossible because of game theory. In a perfect world everyone would get along and no one would have to dump billions into the military. That's impossible because there's always a "rat" that uses this opportunity to invade and conquer defenseless territories. A rat kind of like Russia or soon potentially China.

Because of them now everybody has to invest in their military and we are all worse off because of it, this can also apply to nukes. One power will exploit their nuclear advantage over one who doesn't, which is why the USSR and CCP, DPRK,, and Pakistan developed nukes, their rivals had one too.

I encourage you to watch veritasium's video on the concept of game theory and how it affects most things in our lives.