1. Introduction; Part I. Legal Statics: 2. Social rules and norms; 3. Legal systems; 4. The rule of law and its value; Part II. Legal Dynamics: 5. Adjudication and the realist challenge; 6. Legislation, administration, and discretion; 7. Conclusion; Appendix 1. The principles of legality; Appendix 2. Measuring the rule of law.