The judiciary (also known as the judicial system, judicature, judicial branch, judiciative branch, and court or judiciary system) is the system of courts that adjudicates legal disputes/disagreements and interprets, defends, and applies the law in legal cases.
The judiciary is the system of courts that interprets, defends, and applies the law in the name of the state. The judiciary can also be thought of as the mechanism for the resolution of disputes. Under the doctrine of the separation of powers, the judiciary generally does not make statutory law (which is the responsibility of the legislature) or enforce law (which is the responsibility of the executive), but rather interprets, defends, and applies the law to the facts of each case. However, in some countries the judiciary does make common law.
In many jurisdictions the judicial branch has the power to change laws through the process of judicial review. Courts with judicial review power may annul the laws and rules of the state when it finds them incompatible with a higher norm, such as primary legislation, the provisions of the constitution, treaties or international law. Judges constitute a critical force for interpretation and implementation of a constitution, thus in common law countries creating the body of constitutional law.
Legal history
This is a more general overview of the development of the judiciary and judicial systems over the course of history.
Roman law and Byzantine law
The most important part was Ius Civile (Latin for "civil law"). This consisted of Mos Maiorum (Latin for "way of the ancestors") and Leges (Latin for "laws"). Mos Maiorum was the rules of conduct based on social norms created over the years by predecessors. In 451–449 BC, the Mos Maiorum was written down in the Twelve Tables. Leges were rules set by the leaders, first the kings, later the popular assembly during the Republic. In these early years, the legal process consisted of two phases. The first phase, In Iure, was the judicial process.