Nuclear weapon proliferation is actually two risks fighting each other for total risk curves fighting each other - conventional war prevention and irrational ac

Nuclear weapon proliferation is actually two risks fighting each other for total risk curves fighting each other - conventional war prevention and irrational actor risk. More proliferation prevents conventional wars. Pakistan and India have limited themselves to skirmishes at worst. However the more proliferation the greater the risk of a suicidal actor who doesn't care about or seeks mutually assued destruction. If you want world peace betweeen nations at any cost give every nation ICBMs and nuclear warheads sufficient to break through enough of everyone's defenses - it will last unless and until thermonuclear war starts.