This volume contains a collection of selected papers presented in the working groups of the 23rd World Congress of Legal and Social Philosophy held in Kraków in August 2007. The papers focus on three main topics: the legal system investigated from various perspectives, social and ethical issues in the law and the problem of liberty and state. The papers present different views and perspectives, as their authors come from different countries and legal cultures. Readers will have an opportunity to compare different approaches to certain classical problems of legal philosophy and to learn about certain new ideas pursued by researchers from different legal cultures.