And would universal adoption end small ones?

These are certainly not new questions, but they are ones that I do not believe have been discussed her before.

Did those fateful August 6 and 9, 1945 bombings bring an end to the cycle of major powers directly engaging each other in conflict that had lasted since the dawn of humanity? Could the current major powers cut virtually all 'hard' military spending without jeopardizing their respective national securities? And by 'hard', I mean the legacy institutions meant to engage other major powers such as the standard infantry and armored divisions, the naval battlegroups, and the air combat commands, not the special forces anti-terrorism/anti-piracy small scale stuff.

Further, if every nation maintained a nuclear arsenal, would there be no more wars?