The book comprises contemporary legal theory pertaining to Democratic States based on the Rule of Law from the perspective of general principles of law, it explains in detail, theoretically and based on the specific case law, the phenomenon of general princi- ples of law - as a source of law and directly applicable legal norms. It is a work of legal theory, legal philosophy, and legal method, but it will also assist scholars and practi- tioners in the transitional justice field as it shows how this theory of general principles of law has assisted Latvia to move away from the socialist legal tradition. Daiga Rezevska, Dr.iur. (2004), University of Latvia, is Professor, former justice of the Constitutional Court, and ad hoc judge of the European Court of Human Rights. Her most recent publication is Legislation in Latvia. In: Karpen U.. Xanthakı H. Eds Legis- lation in Europe. Country by Country Guide (Hart Publishing, 2021).