
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, which means to stand by things decided. Common law originated in England and is now used in several countries, including the United States, Australia, Canada, and India. It is often contrasted with civil law, which has a clear set of statutes that outline the procedures and punishments for various offences. Common law is created by judges when they decide cases and interpret previous rulings and statutes. While common law is not codified, it can be overruled, and it can also inspire new legislation.
| Characteristics | Values |
|---|---|
| Basis | Judicial decisions, not statutes |
| Other names | Judicial precedent, judge-made law, case law, ratio decidendi |
| History | Originated in the courts of English kings, spread to North America in the 17th and 18th centuries |
| Current usage | Practiced in the US, UK, Australia, Canada, Hong Kong, India, and New Zealand |
| Sources | Stare decisis (Latin for "to stand by things decided"), previous rulings, and institutionalized opinions and interpretations |
| Flexibility | Allows freedom for interpretation and adaptation to new situations |
| Codification | Rules are not written down, but some states codify common law rules to give them permanence |
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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 also known as case law or judge-made law
- Common law is a body of unwritten laws based on legal precedents
- Common law is distinct from civil law, which is a comprehensive, codified set of statutes
- Common law marriage is a legal framework that allows couples to be considered married without formally registering their union

Common law is deeply rooted in stare decisis, which means to stand by things decided
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 is largely based on precedent—judicial rulings made in previous similar cases. The concept of common law is deeply rooted in stare decisis, which means "to stand by things decided". In other words, stare decisis is a precedent or a history of judicial decisions that form the basis of evaluation for future cases.
The presiding judge determines which precedents to apply in deciding each new case. 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 new precedent.
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.
Common law originated in England in the centuries following the Norman Conquest. It was common to all the king's courts across England and was the primary source of law for several hundred years before Parliament acquired legislative powers to create statutory law. Today, common law is practiced in several countries, including the United States, the United Kingdom, Australia, Canada, Hong Kong, India, and New Zealand.
The doctrine of stare decisis is particularly important in the context of common law. State supreme courts, as common-law courts, are empowered to develop common-law doctrines in addition to interpreting democratically enacted texts. This dual function of state supreme courts calls for two distinct approaches to stare decisis, as argued by Justice Thomas in his concurrence in Gamble v. United States.
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Common law is also known as case law or judge-made 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 is deeply rooted in stare decisis, which means "to stand by things decided". In other words, common law is largely based on precedent, or judicial rulings made in previous similar cases. The presiding judge determines which precedents to apply in deciding each new case.
The term "judge-made law" was introduced by Jeremy Bentham as a criticism of the legal profession's pretenses. Many notable writers, including A. V. Dicey, William Markby, and Oliver Wendell Holmes, eventually adopted the modern definition of common law as "case law" or ratio decidendi, which serves as binding precedent.
Common law originated in the practices of the courts of English kings in the centuries following the Norman Conquest. It was common to all the king's courts across England, replacing the pre-Norman system of local customs and law that varied in each locality. In the 1180s, Henry II developed the practice of sending judges to hear disputes throughout the country, and these decisions were recorded and filed. Over time, a rule known as stare decisis developed, whereby a judge would be bound to follow the decision of an earlier judge if the two cases had similar facts.
Today, the US operates under a dual system of both common and civil law. Common law is also practiced in Australia, Canada, Hong Kong, India, New Zealand, and the United Kingdom.
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Common law is a body of unwritten laws based on legal precedents
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, which means "to stand by things decided". This means that judges in common law jurisdictions rely on previous court rulings and decisions to determine how to decide on current cases. The presiding judge determines which precedents to apply in deciding each new case.
Common law is primarily developed through judicial decisions rather than statutes. It draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law is derived from its original appearance in medieval England and was the primary source of law for several hundred years before Parliament acquired legislative powers to create statutory law.
In the United States, common law was introduced during the 17th and 18th centuries through British colonialism. Today, the US operates under a dual system of both common and civil law. Common law is also practiced in Australia, Canada, Hong Kong, India, New Zealand, and the United Kingdom.
Common law is often contrasted with civil law, which is a comprehensive, codified set of legal statutes created by legislators. Civil law clearly defines the cases that can be brought to court, the procedures for handling claims, and the punishments for offences. In contrast, common law allows for adaptability, as the law can be interpreted and applied to situations that were not contemplated at the time by the legislature.
Common law has been criticised for its potential to lead to the unfair marginalisation or disempowerment of certain groups. Past decisions may continue to shape future rulings until societal changes prompt a judicial body to overturn the precedent.
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Common law is distinct from civil law, which is a comprehensive, codified set of statutes
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. It is largely based on stare decisis, which means "to stand by things decided". Common law originated in England during the Middle Ages and was spread to former British colonies or protectorates across continents, including the United States, Australia, Canada, India, and New Zealand.
Civil law, on the other hand, is a comprehensive, codified set of legal statutes created by legislators. It is generally more prescriptive than common law, with codes in place to cover all eventualities. Civil law developed in continental Europe and was historically applied in the colonies of European imperial powers such as Spain and Portugal. Today, it is used in approximately 150 countries, while common law is used in about 80 countries.
The main difference between common law and civil law lies in their primary source of law. Common law systems, while making use of statutes, consider judicial cases as the most important source of law, giving judges an active role in developing rules. In contrast, civil law systems rely on codes and judges have a more limited role of applying the law to specific cases. Common law is generally uncodified, meaning there is no comprehensive compilation of legal rules, and it is deeply rooted in precedent, with past rulings influencing future decisions.
In a civil law system, the judge's role is primarily to establish the facts of the case and apply the relevant provisions of the code. This system provides clear guidance on which cases can be brought to court, the procedures for handling claims, and the punishments for offenses. Additionally, civil law tends to have more provisions implied in contracts, allowing for ambiguities and inadequacies to be resolved by operation of law.
In summary, common law and civil law represent two distinct legal traditions with different approaches to the role of judges, the importance of precedents, the level of prescription, and the extent of codification. Common law evolved from Anglo-Saxon traditions and emphasizes judicial decisions, adaptability, and stare decisis, while civil law stems from Latin and Roman traditions, favoring comprehensive codification and a more limited judicial role.
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Common law marriage is a legal framework that allows couples to be considered married without formally registering their union
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 and is still in effect in the US, the UK, and elsewhere. Common law is deeply rooted in stare decisis, which means that courts follow precedents established by previous decisions.
In family law, common-law marriage is a legal framework that allows couples to be considered married without a formal wedding ceremony, marriage license, or marriage certificate. It is also known as a non-ceremonial or informal marriage. Common-law marriage is not common in the US, but several states, including Texas, allow it if certain requirements are met. These requirements vary by state but generally include living together, the legal capacity to marry, intent to be married, and behaving as a married couple.
While the requirements differ across states, some common themes emerge. For example, both partners must be at least 18 years old and not already married to anyone else. The amount of time a couple lives together is considered on a case-by-case basis, but generally, the longer they live together, the stronger their case for common-law marriage. Proving a common-law marriage can be challenging, and the parties may need to provide evidence if they wish to inherit property or receive benefits.
In some jurisdictions, common-law marriage is not recognized, such as in Canada and Scotland. However, Canada recognizes informal cohabitation relationships, granting legal rights and obligations to couples in marriage-like relationships, and Scotland previously had a form of irregular marriage called 'marriage by cohabitation with habit and repute'.
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Frequently asked questions
Common law is a body of unwritten laws based on legal precedents established by the courts.
Judge-made common law was the primary source of law for several hundred years before Parliament acquired legislative powers to create statutory law. Common law originated in England and is still in effect in the US and elsewhere today.
Common law relies on detailed records of similar situations and statutes because there is no official legal code that can be applied to a case at hand. The presiding judge determines which precedents to apply in deciding each new case.
Civil law is a comprehensive, codified set of legal statutes created by legislators. A civil system clearly defines the cases that can be brought to court, the procedures for handling claims, and the punishment for an offense. Common law, on the other hand, is more flexible and allows for interpretation.
Common law can be applied in various areas, including negligence, contracts, and marriage. For example, determining responsibility in a car accident or resolving a dispute over a wedding photographer's payment are situations where common law principles of negligence and contracts may be used. Additionally, common-law marriage, also known as a non-ceremonial marriage, grants similar rights to couples who are not officially married if certain conditions are met.




















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