The book "The Legal Doctrines of the Rule of Law and the Legal State (Rechtsstaat)" offers a comprehensive analysis of the development of the concepts of the rule of law and legality from the perspective of civil law as well as common law. It highlights the philosophical and historical backgrounds of both concepts and examines the interactions between these two legal doctrines. With contributions from twenty-five leading scholars from around the world, it presents both a general and a specific legal perspective on the topic in contemporary and historical contexts. The concepts of the rule of law and legality are fundamental guarantees for human dignity as well as for the legitimacy of the state and the authority of state regulations.