Nuclear deterrence has been a key part of international security since the end of World War II. It has helped to prevent major conflicts between nuclear-armed countries, and has played a role in maintaining peace during periods of tension.
However, nuclear deterrence is also a dangerous and unstable strategy. If one side misjudges the other's willingness to use nuclear weapons, or if a technical or human error occurs, a nuclear war could start by accident.
There is no guarantee that nuclear deterrence will work forever. As the number of nuclear-armed countries increases, and as technology changes, the risk of a nuclear war increases.
For these reasons, many people believe that nuclear weapons should be abolished. They argue that the risk of a nuclear war is too great, and that there is no way to guarantee that nuclear deterrence will work indefinitely.
Others believe that nuclear weapons are necessary to maintain peace and security. They argue that nuclear weapons have prevented major wars between nuclear-armed countries, and that they have played a positive role in maintaining stability during periods of tension.
Ultimately, the decision of whether or not to abolish nuclear weapons is a complex and difficult one. There are valid arguments on both sides of the issue.