In the words of our Holy Father, we need a "moral about face." The whole world must summon the moral courage and technical means to say "no" to nuclear conflict; "no" to weapons of mass destruction; "no" to an arms race which robs the poor and the vulnerable; and "no" to the moral danger of a nuclear age which places before humankind indefensible choices of constant terror or surrender. Peacemaking is not an optional commitment. It is a requirement of our faith. The Challenge of Peace: God’s Promise and Our Response