This is a systematic philosophical study of the notion of a social practice.This is the first systematic philosophical and conceptual study of the notion of a social practice. Raimo Tuomela shows how social practices (for example customs and traditions) are building blocks of society, and he offers a clear and powerful account of the way in which social institutions are constructed from these building blocks as established, interconnected sets of social practices. His book will be of interest to a wide range of readers in philosophy of mind, philosophy of social science, psychology and sociology.This is the first systematic philosophical and conceptual study of the notion of a social practice. Raimo Tuomela shows how social practices (for example customs and traditions) are building blocks of society, and he offers a clear and powerful account of the way in which social institutions are constructed from these building blocks as established, interconnected sets of social practices. His book will be of interest to a wide range of readers in philosophy of mind, philosophy of social science, psychology and sociology.This philosophical and conceptual study shows how social practices (customs and traditions) are building blocks of society. Raimo Tuomela systematically reveals how social institutions are constructed from these building blocks. His analysis is based on the novel concept of shared we-attitudes, which represent a weak form of collective intentionality, and he makes instructive connections to major topics and figures in philosophy and the social sciences.List of figures; Acknowledgements; Introduction; 1. Collective intentionality and the construction of the social world; 2. Collective intentionality; 3. Conceptual activity, rule following and social practices; 4. An account of social practices; 5. A collective acceptance account of collective-social notions; 6. Social institutions; 7. Social practices in a dynamic context: a mathematical analysis; El-