What I am trying to say is that seizing the world's most powerful weapons as sole property of 5 countries and expecting others not to make their own is stupid. No one will accept it in reality and will pursue nukes.
Iranians are the example where they are a smart country with a very evolved populance. They don't care what NATO says. They don't care what EU or USA say. They still got the nukes. And I personally don't think it is a problem. Iranians are not like our hosts here who will keep using that nuke umbrella to threaten the world. That is American perception as usual.
There are many nuclear-material rich nations which don't need to import the radioactive material and can simply mine them. And getting access to technology is just a matter of politics. If someone with as limited resources as North Korea and Pakistan could make it, I don't really see how it would be difficult for KSA, Turkey, Indonesia, Brazil, Argentina and such stable and resourceful nations from getting access to them.