What constitutes the largest body of law in the legal system?

Case law constitutes the largest body of law in the legal system because it encompasses all judicial decisions made by courts that interpret statutes, regulations, and constitutional provisions. This body of law is developed over time through the doctrine of precedent, where courts are bound to follow the legal principles established in previous rulings. As cases are adjudicated, the decisions set forth important legal standards and interpretations that guide future cases, creating a comprehensive matrix of legal principles.

While statutory law represents laws enacted by legislatures, and administrative law deals with the rules and regulations created by governmental agencies, case law includes all interpretations and applications of those laws by judges, reflecting the dynamic and evolving nature of the legal system. International law, on the other hand, governs relationships between nations, which, while important, does not encompass the vast array of legal interpretations and applications found in national legal systems. Hence, case law stands as the most extensive and significant body of law due to its broad applicability and the integral role it plays in the functioning of the legal system.