Code of law

A code of law, also known as a law code or legal code, is a systematic collection of statutes created through codification. It is a form of legislation intended to comprehensively cover either an entire legal system or a specific area of law as it stood when enacted. While the reasons and methods for codification are similar across common law and civil law systems, how these codes are used differs significantly. In a civil law country, a code typically aims to exhaustively cover a whole field of law, such as civil or criminal law. In contrast, in a common law country following English traditions, a code only modifies existing common law to the extent of its explicit or implied provisions, leaving the rest of the common law untouched. In the United States and similar common law jurisdictions, a code is a standing body of statute law on a particular subject, which is then altered by individual legislative acts.

The earliest known evidence of a law code comes from tablets discovered in the ancient city of Ebla (modern-day Syria), dating to 2400 BC. Other early codes from the ancient Middle East include the UrukAgina Law Code (2380–2360 BC), the Sumerian Code of Ur-Nammu (c. 2100–2050 BC), the Code of Eshnunna, the Code of Lipit-Ishtar (1934–1924 BC), and the Babylonian Code of Hammurabi (c. 1760 BC), all originating from Sumer and Mesopotamia (modern Iraq). In the Roman Empire, codes like the Twelve Tables (first compiled in 450 BC) and the Corpus Juris Civilis of Justinian (429–534 AD) were developed, but neither exhaustively described the Roman legal system. The Twelve Tables were limited, with most legal doctrines created by the pontifices interpreting them, while the Justinian Code simply collected existing legal materials.

In ancient China, the first comprehensive criminal code was the Tang Code, created in 624 AD during the Tang dynasty. This code, along with later imperial codes, formed the basis for penal systems in China and other East Asian states under its cultural influence. The last and best-preserved imperial code is the Great Qing Legal Code, created in 1644 at the founding of the Qing dynasty. It served as the exclusive and exhaustive statement of Chinese law from 1644 to 1912. Although it was a criminal code in form, large portions dealt with civil law matters and dispute resolution. It ceased operation with the fall of the Qing dynasty in 1912, but significant provisions remained in effect in Hong Kong until the 1970s due to a unique interaction with the British common law system.

In Europe, Roman law, especially the Corpus Juris Civilis, became the foundation for many legal systems, either adopted by legislation or processed by jurists. The accepted Roman law was then often codified and formed part of a central code. The codification movement accelerated after the rise of nation-states following the Treaty of Westphalia. Notable national civil codes include the French Napoleonic Code (1804), the Austrian civil code (1812), the German civil code (1900), and the Swiss codes. These 19th-century European codifications influenced Catholic canon law, resulting in the 1917 Code of Canon Law, later replaced by the 1983 Code of Canon Law, with its Eastern counterpart being the Code of Canons of the Eastern Churches. Meanwhile, African civilizations developed their own legal traditions, sometimes codifying them through consistent oral tradition, as seen in the Kouroukan Fouga, a charter proclaimed by the Mali Empire in 1222–1236 that enumerated constitutional and civil regulations and is still transmitted by griots under oath.

The Continental civil law tradition spread globally with European cultural and military dominance. During the Meiji Restoration, Japan adopted a new Civil Code in 1898, based mainly on the French civil code and influenced by the German code. After the Xinhai Revolution of 1911, the Republic of China abandoned the imperial code tradition and adopted a new civil code strongly influenced by the German Bürgerliches Gesetzbuch and the Japanese code, a tradition largely maintained in the People's Republic of China since 1949. Codifications also became more common in common law systems; for example, criminal codes exist in many common law jurisdictions in Australia and the Americas, and their adoption continues to be debated in England. In the Americas, the influence of Continental codes appears in two ways: civil law jurisdictions use codes in the Continental tradition, while common law jurisdictions have seen a strong trend toward codification. However, the result is not always a legal code like those in civil law systems; the California Civil Code, for instance, largely codifies common law doctrine and differs greatly in form and content from other civil codes.

A civil code typically forms the core of civil law systems, exhaustively covering the entire system of private law. A criminal code, or penal code, is a common feature in many legal systems, and codifying criminal law allows it to be systematically organized.