Although the issue of nuclear disarmament has largely fallen off the political agenda—save for rare wins like the deal with Iran last year—the threat of nuclear war remains no less severe. The start of the new year saw the purported test of a hydrogen bomb by North Korea, one of four nuclear-armed countries that have not yet acceded to the Nuclear Non-Proliferation Treaty (the others being Israel, India, and Pakistan). Progress toward disarmament has also been absent in the countries that are party to the NPT, as the United States, Russia, the United Kingdom, France, and China continue to invest heavily in modernizing or expanding their current nuclear arsenals. Not only are such steps wasteful, but they are also dangerous. Even a small nuclear war, whether by error, miscalculation, or folly, could have catastrophic effects, including the potential to destroy most complex life on earth. The zero path is the only sure way to security: total nuclear disarmament once and for all.