In the past few years we have begun to worry, with a sort of expiatory zeal, about the state· of our environment, the size of our population, the political economy and the morality of the allocation of goods and jobs, and the future of our resources. While computer projections cast a malthusian pall over our world, we have had a bitter, first-hand taste of shortages of all kinds. The sempiternal battle between producers and consumers rages with a new ferocity, as high prices provoke anger on the one side and celebration on the other. Even as famines continue to strike the third world in the thermidor of the green revolution, so we have discovered hunger in our own midst.