Common law
The common lawso named because it was "common" to all the king's courts across Englandoriginated in the practices of the courts of the English kings in the centuries following the Norman Conquest in 1066. The British Empire spread the English legal system to its historical colonies, many of which retain the common law system today. These "common law systems" are legal systems that give great precedential weight to common law, and to the style of reasoning inherited from the English legal system.
History of citizenship
Specialists in law found ways to adapt the fixed laws, and to have the common law or jus gentium, work in harmony with natural law or ius naturale, which are rules common to all things. Property was protected by law, and served as a protection of individuals against the power of the state. In addition, unlike the Greek model where laws were mostly made in the assembly, Roman law was often determined in other places than official government bodies. Rules could originate through court rulings, by looking to past court rulings, by sovereign decrees, and the effect was that the assembly's power became increasingly marginalized.