
Common law, also known as case law, is a body of law unwritten laws based on legal precedents and judicial decisions. It is deeply rooted in the principle of stare decisis, which means to stand by things decided. In other words, common law is largely based on precedent, where courts follow precedents established by previous decisions. Common law is flexible and adaptable, allowing for interpretation and responding to changes in society. It originated in medieval England and is now found in the US, UK, Canada, India, Australia, and most members of the Commonwealth. Common law is used to resolve legal disputes and can guide court rulings when the outcome is undetermined based on written rules of law. It includes judicial interpretation of fundamental laws, such as the US Constitution, and the application of law to specific facts.
| Characteristics | Values |
|---|---|
| Basis | Judicial decisions and rulings (case law) rather than statutes |
| Name origin | Common to all the king's courts across England |
| Foundation | Precedent (stare decisis) |
| Flexibility | Can respond to changes in society |
| Jurisdiction | Binding only in a particular jurisdiction |
| Interaction with other laws | Interactions with constitutional, statutory, and regulatory law give rise to complexity |
| Common law marriage | Acknowledges similar rights to those with a marriage license to couples that are not officially married |
| Common law vs civil law | Common law is a body of unwritten laws, while civil law is a comprehensive, codified set of legal statutes created by legislators |
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What You'll Learn
- Common law is deeply rooted in stare decisis, which means to stand by things decided
- Common law is flexible, allowing higher courts to overrule prior decisions without lawmakers
- Common law is based on legal precedents, which may guide rulings when outcomes are undetermined
- Common law originated in the practices of English king's courts following the Norman Conquest in 1066
- Common law systems are more complicated in practice, with interactions between other laws creating complexity

Common law is deeply rooted in stare decisis, which means to stand by things decided
Common law is a body of law that is primarily developed through judicial decisions rather than statutes. It is a flexible system that can respond to changes in society and is deeply rooted in the Latin principle of stare decisis, which means "to stand by things decided". This means that common law is based on the precedent of following previous rulings and decisions when dealing with similar cases in the future.
The name "common law" comes from the fact that it was common to all the king's courts across England and its legal system, originating in the practices of the English kings' courts following the Norman Conquest in 1066. It established a unified legal system, gradually replacing local folk and manorial courts. England then spread its legal system across the British Isles and to its overseas colonies, continuing the spread of the English common law system.
In a common law system, judges are empowered to resolve issues and establish new precedents in "cases of first impression" where there is no precedent or clear legislative guidance. This is a significant difference from civil law systems, where a judge's decision is not binding in later cases involving different parties. Common law allows for the adaptation of the law to new situations and changes in society, giving judges the freedom to interpret and apply the law accordingly.
Common law is practised in several countries today, including the United States, the United Kingdom, Australia, Canada, Hong Kong, India, and New Zealand. While the US and UK operate under a dual system of both common and civil law, the influence of common law is still significant. The flexibility of common law allows it to respond to the evolving needs of society, making it an important aspect of the legal systems in these countries.
The decisions of a court in a common law system are binding only within a particular jurisdiction, and even within a jurisdiction, some courts have more power than others. For example, appellate court decisions are typically binding on lower courts within the same jurisdiction. The interaction between common law and other types of law, such as constitutional law and statutory law, adds complexity to the legal system. However, the principle of stare decisis remains a fundamental aspect of common law, guiding judges in their decision-making process.
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Common law is flexible, allowing higher courts to overrule prior decisions without lawmakers
Common law is a body of unwritten laws based on legal precedents, which may guide court rulings when the outcome is undetermined based on written rules of law. It is deeply rooted in stare decisis, a Latin phrase that means "to stand by things decided". Here, courts follow precedents established by previous decisions. 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.
The decisions of a court in common law are binding only in a particular jurisdiction, and even within a given jurisdiction, some courts have more power than others. For instance, in most jurisdictions, decisions by appellate courts are binding on lower courts in the same jurisdiction, and on future decisions of the same appellate court, but decisions of lower courts are only non-binding persuasive authority. Statutes generally supersede common law and may codify existing common law, create new causes of action, or legislatively overrule the common law.
Common law is also known as judicial precedent, judge-made law, or case law. It is primarily developed through judicial decisions rather than statutes. While common law may incorporate certain statutes, it is largely based on precedent—judicial rulings made in previous similar cases. The presiding judge determines which precedents to apply in deciding each new case. Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries. It aims to establish consistent outcomes by applying the same standards of interpretation.
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Common law is based on legal precedents, which may guide rulings when outcomes are undetermined
Common law is a body of law unwritten laws based on legal precedents established by the courts. It is deeply rooted in the principle of stare decisis, which means "to stand by things decided". In other words, common law is based on the idea that courts should follow precedents set by previous decisions. When a similar case has already been resolved, courts will typically align their reasoning with the precedent set in that previous decision. However, in a "case of first impression", where there is no applicable precedent or clear legislative guidance, judges are empowered to resolve the issue and establish a new precedent. This flexibility is a key feature of common law, allowing it to respond to changes in society.
Common law originated in England in the practices of the English king's courts following the Norman Conquest in 1066. It established a unified legal system across England and gradually replaced local folk courts and manorial courts. Over time, England spread its legal system to Wales, Ireland, and its overseas colonies, and later to other parts of the world through the British Empire. Today, several countries continue to rely on common law systems, including the United States, the United Kingdom, Australia, Canada, Hong Kong, India, and New Zealand.
While common law is based on legal precedents, it is important to note that it is not a pure system. Statutes can supersede common law, and they may codify existing common law, create new causes of action, or overrule the common law. Common law courts interpret and apply these statutes, and their decisions become part of the body of common law. In this way, common law and statutes interact and influence each other.
The application of common law can vary depending on the jurisdiction and the specific court. For example, within a given jurisdiction, higher courts generally have more power than lower courts. Decisions of appellate courts are typically binding on lower courts in the same jurisdiction, while decisions of lower courts may only be persuasive authority. Additionally, in some jurisdictions, common law may interact with other types of law, such as constitutional law, statutory law, and regulatory law, further complicating its application.
In summary, common law is a flexible and adaptable legal system based on the principle of stare decisis, or following legal precedents. While it is deeply rooted in precedent, common law also allows for the establishment of new precedents when necessary and can be influenced by statutes and other types of law. This body of unwritten laws continues to form the basis of legal systems in many countries around the world.
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Common law originated in the practices of English king's courts following the Norman Conquest in 1066
The common law system in England began to develop after the Norman Conquest in 1066. The Norman Conquest, led by William the Conqueror, the Duke of Normandy, brought about immense changes in the political, economic, social, and legal landscape of the country.
Prior to the Norman Conquest, much of England's legal business was carried out in local folk courts, urban boroughs, and merchant fairs, as well as in manorial and seigniorial courts held by large landholders. The Norman Conquest led to the establishment of centralized institutions, including the King's Court or the Regis Curia, which became the primary court for most of the country, based in Westminster, near London.
The English common law that originated in the King's Court was characterized by procedural remedies rather than substantive rights. Over time, these remedies evolved into the modern system, where rights take precedence over procedure. The King's Court was instrumental in developing the principle of stare decisis, which means "to stand by things decided." This principle established the precedent of following previous decisions and rulings, also known as case law or judicial precedent, in similar subsequent cases.
The Norman Conquest did not immediately abolish Anglo-Saxon law, but it did initiate a period of colonial rule that brought about significant changes. Land was distributed to the king's feudal vassals, and the centralized government maintained written records. The Norman custom was not merely transplanted but instead formed the basis for a new set of rules that emerged based on local conditions.
The common law system, with its roots in the practices of English kings' courts following the Norman Conquest, gradually spread across the British Isles and later to colonies, influencing the legal systems of many countries that were historically colonized by England, Great Britain, or the United Kingdom.
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Common law systems are more complicated in practice, with interactions between other laws creating complexity
Common law is a body of unwritten laws based on legal precedents. It is deeply rooted in stare decisis, a Latin phrase that means "to stand by things decided". In other words, common law is primarily developed through judicial decisions rather than statutes, with courts following precedents established by previous rulings.
However, common law systems are more complicated in practice. For one, the decisions of a court are binding only in a particular jurisdiction, and even within a given jurisdiction, some courts have more power than others. For example, in most jurisdictions, decisions by appellate courts are binding on lower courts in the same jurisdiction, but decisions of lower courts are only non-binding persuasive authority.
Additionally, common law interacts with other types of laws such as constitutional law, statutory law, and regulatory law, creating complexity. Statutes, for instance, may codify existing common law, create new causes of action, or legislatively overrule the common law. Common law also has to be considered in the context of Roman divisions of actions, which categorise actions as either 'in rem' (actions against a thing or property) or 'in personam' (actions directed against a person).
The flexibility of common law further adds to its complexity. Unlike civil law systems, common law allows higher courts to overrule prior decisions without waiting for lawmakers to pass changes in statutes and codes. This means that the law can be adapted to situations not contemplated at the time by the legislature, but it also means that past decisions can continue to shape future rulings until societal changes prompt a judicial body to overturn the precedent.
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Frequently asked questions
Common law is a body of law based on legal precedents established by the courts. It is deeply rooted in stare decisis, which means "to stand by things decided".
Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries. It is flexible and can respond to changes in society. 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.
Common law still has practical applications in some areas of law, such as contract law and the law of torts. Another example is the concept of common-law marriage, which grants similar rights to unmarried couples as those with a marriage license.



















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