Wehler's "Deutsche Gesellschaftsgeschichte," (1987-) is a comprehensive five-volume history of German society in the 18th to the 20th centuries. Each volume approaches historical processes from a social history perspective, organized under the themes of demographics, economics, and social equality. His detailed structural analysis of developmental processes supported by a vast body of notes and statistics sometimes obscures the larger context. Nonetheless, patterns of continuity and change in the social fabric are emphasized. More than a historiographical synthesis of Ranke and Marx (envisioned by some German historians after the catastrophe of World War I), Wehler's work incorporates Max Weber's concepts of authority, economy, and culture and strives toward a concept of "total history."