How many countries have nuclear weapons and how many are there? How destructive are today’s nuclear weapons? What about “nuclear deterrence” theory? Do nuclear weapons help keep the peace? What is the New START Agreement and why has Russia suspended its implementation? What is the Treaty on the Prohibition of Nuclear Weapons? Why does this treaty matter if none of the countries with nuclear weapons have joined? Why should one country give up its nuclear weapons if other countries still have them? Why should countries that don’t have nuclear weapons care about this treaty? Can a NATO state join the TPNW? Did Ukraine give up nuclear weapons? What are "tactical" nuclear weapons? What are 'dirty bombs'?

Will a ban on nuclear weapons be useful if states like North Korea won’t sign it?

Answer

A ban on nuclear weapons will establish an international norm against the possession of nuclear weapons, which will help to reduce the perceived value of such weapons. It will draw the line between those states that believe nuclear weapons are unacceptable and illegitimate, and those states that believe nuclear weapons are legitimate and able to provide security.

If nuclear weapons continue to be portrayed as a legitimate and a useful mean to provide security, non-nuclear weapon states might aim to develop such weapons themselves.

A ban on nuclear weapons would create a global norm against nuclear weapons, which would not only put pressure on both nuclear-armed and non-nuclear weapon states to reject nuclear weapons permanently, but it would also set the stage for future progress in states like North Korea should its domestic political situation change.