
Common law is a body of unwritten laws based on legal precedents established by the courts. It is one of the two main legal systems used today, the other being civil law systems. Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries. It relies on case law and legal precedent to guide decisions, rather than codes or statutes. A precedent, known as stare decisis, is a history of judicial decisions that form the basis of evaluation for future cases.
| Characteristics | Values |
|---|---|
| Definition | A body of unwritten laws based on legal precedents established by the courts |
| Basis | Court decisions, not codes or statutes |
| Principle | Stare decisis, which means "to stand by things decided" |
| System | Relies on caselaw and legal precedent to guide decisions |
| Civil Law | Relies on codes and statutes |
| Civil Law Jurisdiction | Centres around a comprehensive code of statutes |
| Civil Law Decisions | Not binding in other cases, even with similar facts |
| Common Law Jurisdiction | Several stages of research and analysis required to determine the law in a given situation |
| Common Law Decisions | Binding in other cases with similar facts |
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What You'll Learn

Common law is a body of unwritten laws
Common law originated in the early Middle Ages in the King's Court (Curia Regis), a single royal court set up for most of the country at Westminster, near London. It did not originally consist of substantive rights but rather procedural remedies. Over time, the working out of these remedies has produced the modern system in which rights are seen as primary over procedure.
At the centre of common law is a legal principle known as stare decisis, which is a Latin phrase that means "to stand by things decided". In practice, stare decisis dictates that courts and judges need to follow earlier decisions and rulings, or caselaw, when dealing with similar cases later. For example, if a court makes a particular decision based on a specific set of facts, then the court is required to follow that decision if faced with the same or a closely related issue in the future.
In a common law jurisdiction, several stages of research and analysis are required to determine "what the law is" in a given situation. First, one must ascertain the facts. Then, one must locate any relevant statutes and cases. Then, one must extract the principles, analogies, and statements by various courts to determine how the next court is likely to rule on the facts of the present case. Finally, one integrates all the lines drawn and reasons given and applies that law to the facts.
Common law systems are used in several countries around the world, including the United States, which based its common law rules on English common law.
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It is based on legal precedent
Common law is a body of unwritten laws based on legal precedents established by the courts. It is sometimes referred to as case law or ratio decidendi. Common law is influenced by stare decisis, a Latin term that means "to stand by things decided". In other words, common law relies on the principle that courts and judges should follow past decisions and rulings, or case law, when dealing with similar cases in the future. This ensures consistency and stability in the legal system.
The common law system can be contrasted with civil law systems, which rely primarily on codes and statutes. Civil law, which originated in mainland Europe, provides a comprehensive code of statutes that outlines procedures for handling claims and punishments for offences. In a civil law system, judges have clear rules to follow when ruling on specific disputes, and court decisions are not binding in future cases, even if the facts are similar.
Common law, on the other hand, requires a multi-step process to determine the applicable law in a given situation. This process involves ascertaining the facts, locating relevant statutes and cases, extracting principles and statements from various courts, and then applying the determined law to the facts at hand. Recent decisions and those of higher courts carry more weight in this process.
The English common law system originated in the early Middle Ages in the King's Court (Curia Regis) in Westminster, near London. It was further developed by judges in the period after the Norman Conquest of 1066 and was influenced by local customs and the church. Over time, the English common law system has influenced the legal systems of other countries, including the United States and former British colonies.
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Common law is also known as case law
Common law is a body of unwritten laws based on legal precedents established by the courts. It is also known as case law or ratio decidendi, which serves as binding precedent. Common law is often contrasted with civil law, which is a comprehensive, codified set of legal statutes created by legislators. Civil law systems rely primarily on codes and statutes, while common law systems rely on case law and legal precedent to guide their decisions.
The two main legal systems used today throughout the world are common law systems and civil law systems. Common law originated in the early Middle Ages in the King's Court (Curia Regis), a single royal court set up for most of the country at Westminster, near London. It has since spread to many other countries, including the United States, which based its common law rules on English common law.
At its simplest, common law is a "body of law" based on court decisions rather than codes or statutes. However, in reality, common law is often more complicated than that. Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries. It sometimes serves as the inspiration for new legislation to be enacted.
A central principle of common law is stare decisis, a Latin phrase that roughly translates to "to stand by things decided." Stare decisis is the idea that courts and judges need to follow earlier decisions and rulings, or case law, when dealing with similar cases later. This ensures consistency and stability in the legal system. However, lower courts can sometimes modify or deviate from precedents if they are outdated or if the current case is substantially different.
In a common law jurisdiction, several stages of research and analysis are required to determine "what the law is" in a given situation. This involves ascertaining the facts, locating relevant statutes and cases, extracting principles and analogies, and determining how a court is likely to rule based on past decisions.
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It is distinct from civil law
Common law is distinct from civil law. Civil law is a comprehensive, codified system of laws that are created and amended by legislators. It is a system that is prevalent in Europe and other parts of the world and is distinct from common law, which has its origins in England. Civil law is often characterised by consistency and predictability, as the laws are clearly written and easily accessible.
One of the key differences between common law and civil law lies in their historical origins and development. Civil law has its roots in Roman law, particularly the Corpus Juris Civilis, which was a codification of Roman law undertaken by Emperor Justinian in the 6th century AD. This comprehensive legal code served as the foundation for legal systems across continental Europe and was later adopted and adapted by other countries around the world. In contrast, common law developed in England during the Middle Ages, emerging from the decisions and customs of local courts and the king's courts. It evolved over time through judicial decisions, precedents, and custom, rather than through legislative action or codification.
Another distinction between the two systems is their approach to legal procedures and the role of case law. In civil law systems, the focus is often on written statutes and codes, with less emphasis on judicial interpretation and case law. Civil law systems typically follow a more inquisitorial approach, where the judge plays a more active role in investigating the facts of a case and applying the relevant laws. On the other hand, common law systems place significant weight on judicial decisions and case law. Judges interpret statutes and develop the law through their rulings, and previous court decisions are considered binding precedents that must be followed in similar future cases. This stare decisis principle, which means "to stand by things decided," ensures consistency and stability in the law.
The substantive laws and legal concepts in common law and civil law systems can also differ significantly. For example, civil law systems often have a distinct approach to property law, contract law, and tort law. They may have different concepts of ownership and possessory rights, as well as variations in the formation and interpretation of contracts. In contrast, common law systems tend to provide more detailed and nuanced rules in these areas, with a strong emphasis on individual rights and private property ownership. Additionally, civil law systems often have a comprehensive code of criminal law, while common law systems may have a mix of statutory criminal laws and judge-made criminal law principles.
Lastly, the legal professions and the role of lawyers may vary between common law and civil law jurisdictions. In civil law systems, there is often a distinction between advocates or barristers and solicitors or attorneys. Advocates or barristers have rights of audience in higher courts and specialise in courtroom advocacy, while solicitors or attorneys advise clients, draft legal documents, and may appear in lower courts. In contrast, common law jurisdictions often have a fused profession, where barristers and solicitors perform similar functions, and lawyers may transition between roles throughout their careers.
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Common law systems are used worldwide
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. Common law is a system that is used worldwide, with the two main global legal systems being common law and civil law. Common law draws from institutionalised opinions and interpretations from judicial authorities and public juries.
Common law originated in the early Middle Ages in the King's Court (Curia Regis), a single royal court set up for most of the country at Westminster, near London. It is based on the legal principle of stare decisis, a Latin phrase that means "to stand by things decided". In other words, common law relies on past court decisions and rulings, or caselaw, to inform future decisions.
Many countries continue to rely on common law systems today. The United States, for example, based its common law rules on English common law. Similarly, the modern-day Constitution of Ghana embraces English common law in its provisions. Outside of the US, parties in different jurisdictions often choose the law of England and Wales, especially in former British colonies and Commonwealth countries.
In contrast to common law, civil law systems rely primarily on codes and statutes. Civil law centres around a comprehensive code of statutes that outlines procedures for handling claims and punishments for offences. Civil law is regularly updated, and it aims to create order and reduce bias in the application of laws.
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Frequently asked questions
Common law is a body of unwritten laws based on legal precedents and previous court rulings.
Common law is based on previous court rulings and decisions, also known as case law or legal precedent.
Common law influences court rulings when the outcome of a case cannot be determined based on existing statutes or written rules of law.
Common law promotes stability and consistency because everyone involved knows that the outcome will be based on previous case law, rather than subjective, personal viewpoints.
Civil law is a comprehensive, codified set of legal statutes created by legislators. Common law, on the other hand, is unwritten and based on legal precedents established by the courts.












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