The book considers the past accomplishments and future agendas of comparative-historical research in the social sciences. It defines the distinctiveness of this type of research and explores its strengths in explaining important outcomes (e.g. revolutions, social provision, democracy) in the world. It includes sections on substantive research accomplishments, methodology, and theory, and features essays by some of the most important political scientists and sociologists currently working. This review of the accomplishments and future agendas of comparative historical research in the social sciences explores its strengths in explaining important worldwide outcomes (e.g., revolutions, social provision, democracy). It includes sections on substantive research accomplishments, methodology, and theory, and features essays by some of the most important political scientists and sociologists currently working.