More than half a century has passed since the publication of An American Dilemma: The Negro Problem and Modern Democracy, Gunnar Myrdal's agonizing portrait of the pervasiveness of racially prejudiced attitudes and discriminatory practices in American life. Central to Myrdal's work was the paradox posed by the coexistence of race-based social, economic, and political inequality on the one hand, and the cherished American cultural values of...