This was broadly the position of one of the most influential theorists in international relations (IR), Kenneth Waltz. His paper "The Spread of Nuclear Weapons:

This was broadly the position of one of the most influential theorists in international relations (IR), Kenneth Waltz. His paper "The Spread of Nuclear Weapons: More May Better” is a great read. [1] From his conclusion: "Those who dread a world with more nuclear states do little more than assert that more is worse and claim without substantiation that new nuclear states will be less responsible and less capable of self-control than the old ones have been. They express fears that many felt when they imagined how a nuclear China would behave. Such fears have proved un-rounded as nuclear weapons have slowly spread. I have found many reasons for believ­ing that with more nuclear states the world will have a promising future." [1]: https://www.mtholyoke.edu/acad/intrel/waltz1.htm https://www.mtholyoke.edu/acad/intrel/waltz1.htm