Do all nations have the right to nuclear weapons?

Under the theory that everyone ... Even nations ... Have a Right to self-defense: YES

The way world politics is set up now, no. The United Nations has to approve a country for nuclear capabilities. The Treaty on the Non-Proliferation of Nuclear Weapons (“NPT”) aims to avert the danger of nuclear war through the prevention of the wider dissemination of nuclear weapons and other measures. The NPT was opened for signature on 1 July 1968 and entered into force on 5 March 1970.

As for it should be a right? IMO, not at all. I actually believe all nuclear weapons should be destroyed and banned. I am old enough and have been around long enough to know that is never going to happen.

I believe every sovereign nation has (or should have) the right to self-determination, as long as it doesn't adversely impact other countries, humanity, or the sustainability of the Earth.

Yes, I guess Walt is right. When you really think about it, who's to say who can have them and who can't? Scary, but true.

Once again, UN rights

Everyone has the right to life, liberty and security of person.

I guess if someone else has them, then you can have them to feel secure?

A very dodgy question for, in the community of nations, not all members are equal and, certainly, not all are equally responsible.

No matter who has it the possibility for misuse and world annihilation is high. The US is mostly responsible, but would they have been equally responsible under a Barry Goldwater presidency? And would you want a buffoon like Donald Trump to have the final word?

The problems were covered, with some humour, back in the 1960s by no less a person than Tom Lehrer.