This book relates a complex ethical (re)assessment of the continued reliance by some states on nuclear weapons as instruments of state power. This (re)assessment is more urgent considering the relatively recent intensification of great power conflict dynamics and the nuclear-weapon states' recommitments to modernizing, augmenting, or tailoring their nuclear forces to address vital state and alliance interests. And, especially since the beginning of the administration of U.S. President Donald J. Trump, these recommitments have accelerated the degree to which the political and moral dilemmas...