Nuclear disarmament depends on enforceable security

Why is global nuclear disarmament so difficult to achieve?

Disarmament is much harder in an open international system where the technology and possible arsenals cannot be fully verified, so rules must be enforceable and account for states' security fears.

The moral desire to eliminate nuclear weapons is separate from the practical problem of persuading, verifying, and enforcing compliance among states with unequal interests and capabilities. Nuclear technology has spread widely, some arsenals remain uncertain, and several governments regard the weapons as fundamental to national security. Voluntary disarmament may therefore remove weapons first from states most likely to follow an agreement while leaving coercive or secretive powers with an advantage. A declaration is not enough unless institutions can detect creative accounting and impose consequences on countries that refuse to comply. The comparison with domestic gun regulation illustrates the difference between a relatively closed system with police and courts and an international system without an equivalent central authority. The analogy explains an enforcement problem rather than claiming that private firearms and nuclear arsenals are identical.