If there is a challenge weighted by more responsibility and beset by more uncertainty than that of world hunger, I am not aware of it. The possibilities of tragedy are so appalling, the political obstacles to solution so stubborn, the economic realities so complex, the future so unpredictable, and human moral potential so unpromising that one is tempted to put the tougher ethical questions aside and be content to preach the need for more charity. God knows we need more charity. But preaching charity does not finish the job of helping people understand their Christian obligation in the face of the world's hungry people. Meanwhile, we cannot achieve moral responsibility by demanding a better and simpler world in which to practice it. Nor can we wait with ethics until we are wise enough to do it well.