The price of nuclear weapons keeps them from DIY terrorists
... the mass destruction cost curve is protective. The diplomats, scientists, spies, and soldiers of the global non-proliferation regime do incredible work in preventing terrorists and greater numbers of countries from acquiring nuclear weapons. However, their extremely difficult mission would be utterly impossible if uranium was just a little easier and cheaper to weaponize. Perhaps it would be better if nuclear weapons never existed, but, given that they do, we are lucky that they reside at the very top of the mass destruction cost curve.
This is a great, and scary, article about the costs of various arsenals available to despots, Bond villains and terrorists. While nukes are still extremely inaccessible, it's scary how achievable biological and cyber attacks are.March 2017