Still, only 2 states have the power to unleash universal destruction - all the others have delivery systems but they don't have much quantity, so their weapons

Still, only 2 states have the power to unleash universal destruction - all the others have delivery systems but they don't have much quantity, so their weapons are essentially a deterrent force that can be used to either retaliate for a nuclear attack (thus, hopefully, preventing one) or used in an ultimatum to prevent invasion of their homeland or capitulation, but that's it, they can do extreme harm to the target, killing millions of civilians, but they can't eliminate an opponent state the way USA or Russia can.