Preventing or restraining armed aggression needs to be tackled not only by arms control and disarmament, but by just and effective governance on the local, national, and international levels.

Nothing can so erode confidence in the proper use of power by the strongest nation in the world than failure to adhere to the rules that we have agreed should be binding.

We are in a dangerous zero-sum world in which a military reduction in the United States means a military increase somewhere else. To break out of this situation and create a virtuous circle of military reductions, we must pursue a three-prong strategy.

It appears that the U.S. government's desire for nuclear weapons far outruns its need for them -- even by the logic of nuclear deterrence.

Nuclear disarmament is a job for faith -- and for the kind of social movements that faith at its best has always inspired.

Since the non-proliferation treaty took effect in 1970, almost all nuclear nations stopped building nuclear weapons. But even so, they've resisted honoring their full obligations under the NPT.

Thanks to President Obama's initiative, perhaps the season for nuclear disarmament has finally arrived. A new U.S.-Russia treaty, while modest, is important and encouraging.

The field of nuclear weapons has long needed fresh perspectives. For decades there was deterrence, and then disarmament. Finally, there is a group with potential to break new ground.

A Personal 'Nuclear Posture Review' When viewed on film, a nuclear weapons test might strike the discerning eye as a rip in the very fabric of exist...

Terrorists, according to conventional thinking, are immune to deterrence. If they ever obtained nuclear weapons, they'd suffer few qualms about using them.

A generation has come of age when "Fall Out Shelter" signs are nothing but rusty remnants of a time long past.

It's always good fun predicting how our world will end. So many of us engage in this sport, I'm hoping we can somehow harness the considerable intellectual energy that goes into this question.