Controversies in politics arise from many sources, but the conlficts that endure for generations or centuries show a remarkably consistent pattern. In this book, which the author calls a "culmination of thirty years of work in the history of ideas," Sowell attempts to explain the ideological difference between liberals and conservatives as a disagreement over the moral potential inherent in nature. Those who see that potential as limited prefer to constrain governmental authority, he argues. They feel that reform is difficult and often dangerous, and they put their faith in family, custom, law, and traditional institutions. Conversely, those who have faith in human nature prefer to remove institutional and traditional constraints. Controversies over such diverse issues as criminal justice, income distribution, or war and peace repeatedly show an ideological divide along the lines of these two conflicting visions. Thomas Sowell has taught economics at Cornell, UCLA, Amherst, and other academic institutions, and his Basic Economics has been translated into six languages. He is currently a scholar-in-residence at the Hoover Institution, Stanford University. He has been published in both academic journals and such popular media as the Wall Street Journal , Forbes , and Fortune and writes a syndicated column that appears in newspapers across the country. Michael Edwards is a playwright and director from Baltimore. Used Book in Good Condition