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.
Civil law (legal system)
Civil law is primarily contrasted with common law, which is the legal system developed first in England, and later among English-speaking peoples of the world. Despite their differences, the two systems are quite similar from a historical point of view. Both evolved in much the same way, though at different paces. The Roman law underlying civil law developed mainly from customary law that was refined with case law and legislation. Canon law further refined court procedure. Similarly, English law developed from Anglo-Saxon customary law, Danelaw and Norman law, further refined by case law and legislation. The differences are