What lasting impact did the atomic bombings have on global diplomacy, according to Professor Erika Simpson?
1) Necessitated negotiation of new arms control treaties like the NPT
2) Increased reliance on nuclear weapons and nuclear use during conflicts; less reliance on nuclear deterrence; more isolationism
3) Strengthened diplomatic isolation and led to neo-isolationism
4) Enhanced military alliances like NATO leading decision-makers to argue for disarmament rather than deterrence
5) Decreased interest in disarmament; decreased power over alliance strategy