Common law is a legal system that relies on court decisions and precedents rather than written statutes. It originated in England and has been adopted in many countries, including the United States and Canada. In common law, judges interpret laws and their rulings become part of the legal framework, guiding future cases. This system emphasizes the importance of judicial decisions, allowing for flexibility and adaptation over time. As new cases arise, judges can build upon previous rulings, ensuring that the law evolves with societal changes. Common law contrasts with civil law, which is based on comprehensive legal codes.