Book excerpt: Tolerance in the 21st Century investigates some of the key philosophical and practical dilemmas surrounding the implementation and realization of tolerance in the 21st century. In particular, this well thought-out volume investigates the political, social, moral, religious, global, and philosophical issues integral to discussions of tolerance in our current era. The work delves into new areas assessing the problems posed for tolerance by such factors as identity, war, community, the Internet, and gender. Each essay is written by expert scholars who seek to share their particular expertise with some of the most important and essential questions concerning tolerance. Editor Gerson Moreno-Riano has collected essays that ask not only where we are now in the study of tolerance but also seek to make a positive contribution to the study of tolerance by suggesting what can and should be done to further policies and practices of tolerance as well as investigating the limits of tolerance. Tolerance in the 21st Century is certain to delight scholars of political and democratic theory, political participation and citizenship, and American politics.