Civil law, civilian law, or Roman law is a legal system originating in Europe, intellectualized within the framework of late Roman law, and whose most prevalent feature is that its core principles are codified into a referable system which serves as the primary source of law. This can be contrasted with common law systems whose intellectual framework comes from judge-made decisional law which gives precedential authority to prior court decisions on the principle that it is unfair to treat similar facts differently on different occasions (doctrine of judicial precedent, or stare decisis).[
Historically, a civil law is the group of legal ideas and systems ultimately derived from the Corpus Juris Civilis, but heavily overlaid by Napoleonic, Germanic, canonical, feudal, and local practices,] as well as doctrinal strains such as natural law, codification, and legal positivism.
Conceptually, civil law proceeds from abstractions, formulates general principles, and distinguishes substantive rules from procedural rules. It holds case law to be secondary and subordinate to statutory law. When discussing civil law, one should keep in mind the conceptual difference between a statute and a codal article. The marked feature of civilian systems is that they use codes with brief text that tend to avoid factually specific scenarios Code articles deal in generalities and thus stand at odds with statutory schemes which are often very long and very detailed
The civil law takes as its major inspiration classical Roman law (c. AD 1–250), and in particular Justinian law (6th century AD), and further expounding and developments in the late Middle Ages under the influence of canon law.[12] The Justinian Code's doctrines provided a sophisticated model for contracts, rules of procedure, family law, wills, and a strong monarchical constitutional system.[13] Roman law was received differently in different countries. In some it went into force wholesale by legislative act, i.e., it became positive law, whereas in others it was diffused into society by increasingly influential legal experts and scholars.
Roman law continued without interruption in the Byzantine Empire until its final fall in the 15th century. However, subject as it was to multiple incursions and occupations by Western European powers in the late medieval period, its laws became widely available in the West. It was first received into the Holy Roman Empire partly because it was considered imperial law, and it spread in Europe mainly because its students were the only trained lawyers. It became the basis of Scots law, though partly rivaled by received feudal Norman law. In England, it was taught academically at Oxford and Cambridge, but underlay only probate and matrimonial law insofar as both were inherited from canon law, and maritime law, adapted from lex mercatoria through the Bordeaux trade.
Consequently, neither of the two waves of Romanism completely dominated in Europe. Roman law was a secondary source that was applied only when local customs and laws were found lacking on a certain subject. However, after a time, even local law came to be interpreted and evaluated primarily on the basis of Roman law (it being a common European legal tradition of sorts), thereby in turn influencing the main source of law. Eventually, the works of civilian glossators and commentators led to the development of a common body of law and writing about law, a common legal language, and a common method of teaching and scholarship, all termed the jus commune, or law common to Europe, which consolidated canon law and Roman law, and to some extent, feudal law.