Would it have been possible to halt nuclear development, or was the creation of more and deadlier atomic bombs unavoidable?

Halting nuclear development would have been extremely difficult, because a lot of the world was trying to catch on to the metaphoric nuclear weapons train.

I believe that the creation of more nuclear power was unavoidable. For example, during the Cold War, the Soviet Union and the United States primarily focused on building up more nuclear weapons than the other country. With circumstances like these, I think that it would have been very difficult to halt nuclear development.