Book excerpt: This book is one of the first to use citizenship as a lens through which to understand German history in the twentieth century. By considering how Germans defined themselves and others, the book explores how nationality and citizenship rights were constructed, and how Germans defined—and contested—their national community over the century. The volume presents new research informed by cultural, political, legal, and institutional history to obtain a fresh understanding of German history in a century marked by traumatic historical ruptures. By investigating a concept that has been widely discussed in the social sciences, Citizenship and National Identity in Twentieth-Century Germany engages with scholarly debates in sociology, anthropology, and political science.