In the chaotic post-Cold War world, international cooperation is increasingly needed to detect and punish those who aid the spread of nuclear and other weapons of mass destruction. The proliferation of these weapons is a threat to the security of all states, except for a few rogues such as Iraq and North Korea; all other states have a common interest in punishing anyone who would assist the rogue states to acquire highly destructive weaponry. It would be reasonable to assume, therefore, that the proliferation of weapons of mass destruction is widely regarded as an international crime, like piracy, war crimes or aircraft hijacking.
Carnahan, Burrus M.
"Nuclear Smuggling as an International Crime,"
Akron Law Review: Vol. 28
, Article 3.
Available at: https://ideaexchange.uakron.edu/akronlawreview/vol28/iss3/3