It is in my opinion that yes they are in a world where at least 2 nations possess nukes. There are only 2 solutions: complete control and elimination of nukes or the eventual development of such weapons by all nations in order to ward off attack from other nation states.
The spread of Democracy could also stage off nuclear conflicts. Such an ideology is often touted as foreign policy. I however believe this to be bolder dash obviously since the United States is the only country in history to deploy nukes.
Nuclear technology has the potential to be beneficial in energy, healthcare, and space exploration.
We must dissect the words “vital” and “beneficial”. Vital and necessary when faced with the realities of war. Beneficial they are not to a world on the edge of destroying itself.