A legal system is based on a set of legal rules which can be classified into three main systems: the common law system, civil law system and the religious law system. This question asks us why we need a legal system and if we could imagine a society without it. The English legal system is based on Common law which is largely uncodified and it is based on decisions of judges in particular cases applied by other judges later through the process of precedent which is A judicial decision that may be used as a standard in subsequent similar cases. Most of the fundamental legal rules and principles have been established by judges deciding individual cases. However this does not make a common law judge superior to other judges as he himself should refer to other sources such as status, EU law and many others in order to give fair judgments. The English Common law system has slowly been evolving since the Norman Conquest took place in 1066.This Conquest was said to be “A Catastrophe which determined the whole future of England law. And the customary laws were all made general to the whole of England. In a common law system adjudication of disputes is by and adversarial system where the lawyers decide the law on which they want to argue a specific case. It is they who decide what evidence to call including witness and documents and also put questions to the witnesses. The judge plays a passive role and it is his duty to ensure that the trial is conducted in accordance with established rules or procedure and evidence and also deliver his judgments at the end of the trial. Any legal system needs the courts to ensure that all the legal rules put forward by the system are followed by every individual in society but every system has different types of courts that play different roles depending on the nature of the system. Each Court has its own jurisdiction to a certain limit depending on the geographical area. The courts play a major role in the