On the global level, the 2021 entry into force of a nuclear ban treaty — officially known as the Treaty on the Prohibition of Nuclear Weapons — is a sign of hope, even if the nuclear weapons states have yet to join. The very existence of such a treaty does at least help delegitimize nuclear weaponry. It has even prompted dozens of major financial institutions to stop investing in the nuclear weapons industry, under pressure from campaigns like Don’t Bank on the Bomb.

Source: The Profiteers of Armageddon: Oppenheimer and the Birth of the Nuclear-Industrial Complex