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. Prior to the Norman Conquest, much of England's legal business took place in the local folk courts of its various shires and hundreds. A variety of other individual courts also existed across the land: urban boroughs and merchant fairs held their own courts, as did the universities of Oxford and Cambridge, and large landholders also held their own manorial and seigniorial courts as needed. Additionally, the Catholic Church operated its own court system that adjudicated issues of canon law.
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.