"The Complexity of Social Norms" is an academic book that examines the dynamic nature of social norms. It argues that normative behaviors should not be viewed as isolated social objects, but rather as part of a complex interplay of social mechanisms, processes, and narratives that are constantly evolving. The book provides an in-depth analysis of the emergence of new social norms and the conditions that favor their occurrence. It highlights the interactions between cognitive and social aspects of norms over time and explores how expectations, beliefs, and individual rationality influence behavior within social norm complexes. This perspective opens up new research avenues for investigating the social embedding and social constraints of behavior.