
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. It originated in England during the Middle Ages in the King's Court (Curia Regis), a single royal court set up for most of the country at Westminster, near London. The common law of England was largely created in the period after the Norman Conquest of 1066. It is deeply rooted in stare decisis, a Latin phrase that means to stand by things decided, where courts follow precedents established by previous decisions. Common law is primarily developed through judicial decisions rather than statutes, and it still has practical applications in some areas of law, such as contract law and the law of torts.
| Characteristics | Values |
|---|---|
| Origin | English 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. |
| Basis | Common law is based on precedent and stare decisis ("to stand by things decided"), where courts follow precedents established by previous similar judicial decisions. |
| Development | Common law was developed through judicial decisions and rulings rather than statutes. |
| Influence | Common law has influenced the legal systems in the US, Canada, India, Australia, and most Commonwealth countries. |
| Current Use | Common law is still used in some areas of law, such as contract law and the law of torts. |
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What You'll Learn

Common law's roots in England's Middle Ages
The common law system, as we know it, started in England during the Middle Ages. It originated in the King's Court (Curia Regis), a single royal court set up for most of the country at Westminster, near London. It was common to all the king's courts across England and was largely created in the period after the Norman Conquest of 1066. The Anglo-Saxons, especially after the accession of Alfred the Great in 871, had developed a body of rules resembling those used by the Germanic peoples of northern Europe. Local customs governed most matters, while the church played a large part in the government.
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. It is deeply rooted in stare decisis, a Latin phrase that roughly translates to "to stand by things decided". This means that courts and judges need to follow earlier decisions and rulings or case law when dealing with similar cases. When a similar case has been resolved, courts typically align their reasoning with the precedent set in that decision. However, in a ""case of first impression" with no precedent or clear legislative guidance, judges are empowered to resolve the issue and establish a new precedent.
Unlike civil law systems, which have a comprehensive code of statutes that clearly outline the procedures for handling claims and the punishment for offences, common law systems rely on case law and legal precedent to guide their decisions. Civil law court decisions are not binding in other cases, even if the facts are similar. In contrast, common law promotes stability and consistency as everyone involved knows that the ultimate outcome will be based on previous case law and not on subjective, personal viewpoints.
The common law system in England has directly influenced the legal systems of many countries, including the United States, Canada, India, and Australia, and Wales. It has also partially influenced the distinct legal system in Scotland.
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The role of judges in developing common law
Common law, also known as case law or judge-made law, is a body of unwritten laws based on legal precedents established by the courts. It originated in England during the Middle Ages in the King's Court (Curia Regis), a single royal court set up for most of the country at Westminster, near London. English common law was largely created in the centuries following the Norman Conquest of 1066. Until the late 19th century, it continued to be developed primarily by judges rather than legislators.
Judges play a crucial role in developing common law. When deciding a case, judges rely on stare decisis, a Latin phrase meaning "to stand by things decided". This means that judges follow precedents established by previous similar cases. The presiding judge determines which precedents to apply in each new case. When no precedent or legislative guidance exists, judges are empowered to resolve the issue and establish a new precedent. This process contributes to the evolution of common law over time.
The role of judges in common law jurisdictions differs from that in civil law systems. In civil law, judges primarily interpret and apply a comprehensive code of statutes that outline the procedures and punishments for various offences. In contrast, common law systems rely on judicial precedent and case-by-case traditions of individual jurisdictions. Judges in common law systems have more flexibility to interpret the law and establish precedents that guide future decisions.
The decisions of judges in common law systems have a significant impact on the development of the law. Their rulings create precedents that subsequent judges follow, promoting stability and consistency in the legal system. The common law system values stare decisis, ensuring that court decisions are based on previous caselaw rather than subjective viewpoints. This predictability allows individuals and businesses to make informed decisions and choose jurisdictions with well-developed bodies of common law, such as New York for contract law or London for admiralty cases.
While judges play a central role in developing common law, it is important to note that statutes can supersede common law. Legislatures can create new laws or overrule existing common law through legislation. Additionally, critics like Jeremy Bentham have argued against judicial lawmaking, advocating for narrow judicial decisions and codification of the law. Despite these criticisms, the common law system continues to evolve through the decisions and precedents set by judges, shaping the legal landscape in common law jurisdictions.
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Common law's influence on modern legal systems
Common law, which originated in England during the Middle Ages, has had a profound and lasting influence on modern legal systems around the world. It is a body of law based on judicial decisions and precedent rather than statutes, and its principles have been adopted and adapted by numerous countries. Common law is deeply rooted in the concept of stare decisis, which means "to stand by things decided". This principle ensures stability and consistency in legal systems as it requires judges to follow precedents established by previous similar cases.
One of the key characteristics of common law is its reliance on judicial decisions and case law rather than written codes or statutes. This distinguishes it from civil law systems, which centre on a comprehensive code of statutes that outline procedures and punishments for offences. Common law evolved from the practices of the English king's courts following the Norman Conquest of 1066 and was further developed by judges over time. It spread to North America during the colonial period and became the foundation of the legal systems in the United States and most Commonwealth countries.
The influence of common law can be seen in the legal systems of countries such as the United States, Canada, India, and Australia, and the United Kingdom. Commercial parties often choose the law of common law jurisdictions, such as New York or England and Wales, for their contracts due to the depth and predictability of their legal systems. Common law provides a flexible framework that allows judges to interpret and apply precedents to new cases, even when there is no clear legislative guidance. This adaptability has enabled common law to remain relevant and influential in modern legal practice.
While common law forms the basis of many modern legal systems, it has also evolved to incorporate statutes and legislative changes. Statutes may codify existing common law, create new causes of action, or overrule common law. This interplay between common law and statutes demonstrates the dynamic nature of legal systems and the ongoing influence of both judicial decisions and legislative power.
In conclusion, common law has had a significant and lasting impact on modern legal systems. Its emphasis on stare decisis, judicial precedent, and case law has contributed to the development of consistent and adaptable legal frameworks. The influence of common law continues to be felt in the legal practices and contractual relations of numerous countries, highlighting its enduring relevance in the modern world.
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Common law vs civil law
Common law, also known as case law or judge-made law, is a legal system that originated in England in the early Middle Ages. It is primarily developed through judicial decisions and precedent rather than statutes. Common law is deeply rooted in stare decisis, which means that courts follow precedents established by previous rulings. When no precedent exists, judges are empowered to resolve the issue and establish a new precedent. Common law systems provide extensive freedom of contract, implying few provisions into the contract by law, and generally permit anything not expressly prohibited.
In contrast, civil law is a legal system rooted in the Roman Empire and was comprehensively codified and disseminated in the 19th century, with notable examples including France's Napoleonic Code and Germany's Bürgerliches Gesetzbuch. Civil law systems rely on legal codes as their primary source of law rather than judicial precedent. Civil law is generally more prescriptive than common law, implying several provisions into a contract. This reduces the importance of setting out all terms in the contract itself, often resulting in shorter contracts. In civil law jurisdictions, unless a contract specifies arbitration, it will be enforced by administrative courts.
Common law is the predominant legal system in former British colonies and Commonwealth countries, including the United States. Commercial parties often choose the law of common law jurisdictions like New York and England and Wales due to their well-developed bodies of law and predictability. On the other hand, civil law is the world's most common legal system, practiced in about 150 countries. Louisiana is the only U.S. state heavily based on civil law, influenced by French and Spanish codes.
While common law systems emphasise precedent, civil law judges tend to give less weight to prior rulings. For example, the Napoleonic Code forbade French judges from pronouncing general principles of law. The comprehensive codification of civil law should ideally introduce major reforms or start anew, providing a coherent and comprehensive piece of legislation.
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Common law in the US
The common law of England was largely created in the period after the Norman Conquest of 1066. The Anglo-Saxons, especially after the accession of Alfred the Great in 871, had developed a body of rules resembling those used by the Germanic peoples of northern Europe. Local customs governed most matters, while the church played a large part in government. The Norman Conquest did not bring an immediate end to Anglo-Saxon law, but a period of colonial rule by the mainly Norman conquerors produced change. Land was allocated to the king's feudal vassals, and serious wrongs were regarded mainly as public crimes punishable by death and forfeiture of property.
In the early Middle Ages, the King's Court (Curia Regis), a single royal court set up near London, gave rise to English common law. Like many other early legal systems, it did not originally consist of substantive rights but rather procedural remedies. Over time, these remedies have produced the modern system in which rights are seen as primary over procedure. Until the late 19th century, English common law continued to be developed primarily by judges rather than legislators.
In the US, common law differs from civil law, which is followed in Louisiana and is based on codified statutes enacted by the legislative body. Judicial decisions play a crucial role in shaping common law, particularly in areas such as property, contracts, and torts. Common law allows for case-by-case evolution, while civil law provides more uniformity and predictability. Common law courts usually use an adversarial system, in which two sides present their cases to a neutral judge.
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Frequently asked questions
Common law is a body of unwritten laws based on legal precedents established by the courts. It is also known as case law or judge-made law.
Common law developed through judicial decisions rather than statutes. It originated in England during the Middle Ages in the King's Court (Curia Regis), a single royal court set up in Westminster, near London. It was common to all the king's courts across England.
Common law relies on stare decisis, a Latin phrase that means "to stand by things decided". In other words, courts and judges need to follow earlier decisions and rulings or case law when dealing with similar cases.
Civil law is a comprehensive, codified set of legal statutes created by legislators. It centres around a comprehensive code of statutes that outline the procedures for handling claims and the punishment for offences. Common law systems, on the other hand, promote stability and consistency by relying on previous case law to guide their decisions.











































