The early 20th-century Russo-Polish legal thinker Leon Petra?ycki (1867–1931) developed a comprehensive social psychology of law. Because only a fraction of his work is available in English, Petra?ycki is today little known and seldom discussed in the Anglophone countries.This volume aims to remedy this deficit by introducing Petra?ycki's life and work specifically to an English-speaking audience. It is intended as a reappraisal of some of his views in the context of current advancements. This collection of 12 chapters produced by a panel of international scholars from various social science fields will be useful to a new generation of students formulating their own theories and research on socio-legal behavior. Leon Petra?ycki: Law, Emotions, Society will be of interest to students and scholars of sociology of law, socio-legal studies, and philosophy of law