Solidarity in Europe: The History of an Idea. By Steinar Stjernø. Cambridge: Cambridge University Press, 2005. 406p. $75.00.

Steinar Stjernø's important and fascinating book will be valuable to political theorists and sociologists interested in the idea of solidarity from the nineteenth century through the present, to political historians concerned about the uses of solidarity in the political discourses of left-wing, religious, and fascist parties and movements, and to historians of political thought and of ideas who address methodological questions in their field.