Technology empowers people. Weapons technology empowers people. Within 5 years it will be possible to construct a small nuclear device for less than 10 btc. You can't stop the signal.
Decentralized nuclear power may be fundamentally incompatible with the existence of nation-states. City-states, however, are likely to vary widely, from fascistic to democratic to communitarian to plutocratic to monarchic.
I hope that is not true.
You can't fight nuclear bombs with nuclear bombs, just doesn't work.
You can, however, fight it with peace.
How can you find nuclear bomb with peace? Shouldn't you be angry on you enemy and trying your best to defeat them ?