A credible nuclear deterrent is not cheap, but it is far cheaper than fighting a nuclear war, even if the United States were to “win” such a war. Failing to deter the autocrats in Beijing and Moscow will allow them to become increasingly emboldened, increasingly threatening, and increasingly tempted to use nuclear coercion to achieve their goals, not only against their neighbors, but against America’s allies—and potentially against America itself. To prevent this from happening, the United States must build and field the arsenal necessary to keep the American people safe for the next half-century. Nothing less is at stake than America’s global interests and, more important, the welfare of the American people and survival of our constitutional republic.