'Pluralism and Unity' explores the problem of American identity and the nature of political and cultural pluralism in the early 20th century. Originally conceived as a contribution to the U.S. exhibit at Expo '98 in Lisbon, Portugal, Pluralism and Unity has grown into a continuing investigation of the multiple dimensions of modernity and pluralism. The site provides interpretive essays as well as primary material (texts, sounds, images, biographies), thus offering resources on 20th-century discussions about pluralism.