There is no consensus among philosophers, including philosophers of law, whether the present generation has duties to future generations or whether future generations have rights for which the present generation is accountable. Where the moral or legal argument is advanced that we do have duties to future generations in view of their rights, that argument reasonably includes concern for the abolition of nuclear weapons. There is ample moral warrant (e.g., from the moral philosophy of John Rawls) and legal warrant (e.g., from the legal assessment of the International Court of Justice) in the present (1) to account for such duties and (2) for those of our generation to take requisite action that protects the rights of future generations against nuclear catastrophe. Hence, there is a reasonably defensible moral and legal argument in favor of nuclear disarmament.