The sociologist Thomas Sowell writes, "We need to confront the most blatant fact that has persisted across centuries of social history vast ddifferences in productivity among peoples, and the economic and other consequences of such differences." Poverty demeans dignity, shrinks the soul, wastes potential, and inflicts suffering on three billion people on our planet. We must also acknowledge that, during the past fifty yyears, the record in international assistance to the least developed countries has been disappointing; the economics-based abstractions developed in the think tanks of...