The book "The Impact of Cleavages on Swiss Voting Behaviour" offers a comprehensive analysis of the effects of social divisions on voter behavior in Switzerland. It examines how various cleavages, such as religion, social class, rural-urban dynamics, and language, divide voters into different blocks and how these divisions influence voting behavior and the party system in Switzerland. The first part of the book highlights the development of these relevant cleavages between 1971 and 2011 and analyzes changes in voter behavior as well as shifts in the size of social groups as explanatory factors for the decline of cleavage-based voting behavior. The second part provides a contextual perspective and investigates the current impacts of cleavages while considering individual and contextual factors. The concluding part of the book analyzes whether the effects of cleavages have harmonized over time in various contexts, particularly in the Swiss cantons.