The question whether ethnic diversity is associated with declining social cohesion has produced much controversy. We maintain that more attention must be paid to cognitive mechanisms to move the debate ahead. Using survey data from 938 localities in Germany, France, and the Netherlands, we...

Historians have long contested the degree to which the central tenet of the Declaration of Independence - that all men are created equal - has manifested itself in American society and national policy. According to James L. Huston, many historians have focused too intently on class differences,...