
Common 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 based on the idea that courts should follow the decisions and rulings made in previous similar cases. Common law originated in England in the early Middle Ages and has since spread to various countries, including the United States, Canada, Australia, and India. It is one of the two main legal systems used today, alongside civil law. Common law is known for its stability, consistency, efficiency, and adaptability, as it allows courts to address situations not originally contemplated by lawmakers.
| Characteristics | Values |
|---|---|
| Basis of common law | Court decisions, not codes or statutes |
| Latin name | stare decisis ("to stand by things decided") |
| Common law vs civil law | Common law is more malleable than civil law |
| Common law marriage | Couples are considered married without a formal union |
| Common law in practice | US, UK, Australia, Canada, Hong Kong, India, New Zealand |
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What You'll Learn

Common law is a body of unwritten laws
Common law is flexible and adaptable, allowing for interpretation and empowering judges to resolve issues and establish new precedents in cases of first impression. It draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law is also known as case law, and it is practised in the United States, the United Kingdom, Australia, Canada, Hong Kong, India, and New Zealand.
The common law system originated in England in the early Middle Ages in the King's Court (Curia Regis). It established a unified legal system, gradually replacing local folk courts and manorial courts. The English legal system was then spread to Wales, Ireland, and the British colonies, influencing the legal systems in these places.
Common law has been criticised by some, such as Jeremy Bentham, who argued in favour of codification and narrow judicial decisions. However, it has also been praised for its stability, consistency, and efficiency, as it provides a framework for consistent outcomes and does not require legislative intervention for changes to be made.
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Common law is deeply rooted in stare decisis
Common law is a body of unwritten laws based on legal precedents established by the courts. Common law, also known as case law, draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law is deeply rooted in stare decisis, a Latin term that means "to stand by things decided". Stare decisis is a precedent or a history of judicial decisions that form the basis of evaluation for future cases. In other words, stare decisis dictates that courts and judges need to follow earlier decisions and rulings or case law when dealing with similar cases later. For instance, if a court rules on a specific set of facts, then the court is required to follow that decision if they ever rule on the same or closely related issues in the future. Similarly, decisions made by higher courts are usually binding on lower courts in the same jurisdiction.
The common law system is in contrast to civil law systems, which rely primarily on codes and statutes. Civil law, which originated in mainland Europe, centers around a comprehensive code of statutes that clearly outline everything from the procedures for handling claims to the punishments for offenses. In civil law systems, judges' decisions are not binding in other cases, even if the facts are similar. On the other hand, common law promotes stability and consistency because everyone involved knows that the ultimate outcome will be based on previous case law and not on subjective, personal viewpoints.
Common law is adaptable to unforeseen situations and flexible, as it can respond to changes in society. Common law courts are not absolutely bound by precedent but can, with good reason, reinterpret and revise the law without legislative intervention. This allows the law to adapt to new trends in political, legal, and social philosophy. Common law also allows for efficiency in court proceedings, as judges only need to follow precedent when making decisions, saving time and money.
The common law system originated in England 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 established a unified legal system, gradually replacing local folk courts and manorial courts. The English legal system spread to Wales, Ireland, and the British colonies, and it continues to influence the legal systems of many former colonies and Commonwealth nations today.
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Common law is flexible and adaptable
Common law is deeply rooted in stare decisis, which means "to stand by things decided". In other words, common law is based on legal precedents established by the courts. When a similar case has been resolved, courts typically align their reasoning with the precedent set in that decision. However, common law is not absolutely bound by precedent. In a "case of first impression" with no precedent or clear legislative guidance, judges are empowered to resolve the issue and establish new precedent. This makes common law flexible and adaptable.
Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law promotes stability and consistency because everyone involved knows that the ultimate outcome will be based on previous caselaw and not on subjective, personal viewpoints. Common law is also efficient because judges need only follow precedent when making decisions, which can save time and money.
Another benefit of common law is its adaptability to unforeseen situations. When lawmakers create statutes and rules, they cannot predict all the situations in which courts may need to apply the laws. In common law systems, courts can address situations not originally predicted by lawmakers. For example, in the case of a trespasser occupying someone's land, litigants who felt they had been cheated by the common law system would petition the King to have the trespasser evicted, rather than just being awarded damages.
Common law is also flexible because it can respond to changes in society. Unlike civil law systems, common law doesn't require lawmakers to pass changes in statutes and codes, which can take a long time or never happen. When it comes to common law, higher courts can overrule prior decisions as "bad law" without waiting for lawmakers to do so. This allows the law to change substantially over time without sharp breaks, reducing disruption.
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Common law vs civil law
Common law and civil law are the two main legal systems used today across the world. Common 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 medieval England and was spread across the British Empire and its colonies, including the United States. Common law is also practised in Australia, Canada, Hong Kong, India, New Zealand, and the United Kingdom.
In a common law system, judicial decisions are binding and can only be overturned by the same court or through legislation. There is extensive freedom of contract, and generally, everything is permitted unless expressly prohibited by law. Common law is less prescriptive than civil law, and it is important to set out all the terms governing the relationship between the parties in the contract itself. Common law is more malleable than civil law and can be adapted to situations not contemplated by the legislature at the time.
Civil law, on the other hand, is rooted in the Roman Empire and was comprehensively codified and disseminated in the 19th century, notably with France's Napoleonic Code and Germany's Bürgerliches Gesetzbuch. Civil law is primarily characterised by its reliance on legal codes as the primary source of law. Civil law is generally more prescriptive than common law, and there are a number of provisions implied into a contract. This can result in shorter contracts, as ambiguities can be resolved by operation of law.
In civil law systems, court decisions are not binding in other cases, even if the facts are similar. In civil law countries, a separate administrative law often governs PPP arrangements. In a civil law jurisdiction, unless the contract specifies arbitration, it will be enforced by the administrative courts. Civil law has clear rules for how judges need to rule in specific disputes.
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Common law and judicial decision-making
Common law is a body of unwritten laws based on legal precedents established by the courts. Common law is deeply rooted in stare decisis, which means "to stand by things decided". In other words, common law is based on the principle that courts and judges should follow previous decisions and rulings, or case law, when dealing with similar cases in the future. This helps to establish consistent outcomes by applying the same standards of interpretation.
The common law system is flexible and adaptable, as it allows for the interpretation of previous rulings and can respond to changes in society. It is not bound by precedent, and judges are empowered to resolve issues and establish new precedents in cases where no clear precedent exists. Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries. Judges also draw on their experience and learning from everyday life, other fields, and other jurisdictions when making decisions.
The common law system promotes stability and consistency, as it provides a framework for decision-making that is based on previous case law rather than subjective viewpoints. It also allows for efficiency in court proceedings, as judges can rely on precedent when making decisions, saving time and resources.
Common law has its origins in the early Middle Ages in England, specifically in the King's Court (Curia Regis) in Westminster, near London. It was further developed in the centuries following the Norman Conquest in 1066, gradually supplanting local folk courts and manorial courts. The English legal system, including common law, has influenced the legal systems of many other countries, including those in the Commonwealth and former colonies.
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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 deeply rooted in stare decisis, which means "to stand by things decided".
Common law is established when courts follow precedents set by previous decisions. In cases where there is no precedent, judges can resolve the issue and establish a new precedent.
A common example of common law is the concept of a common-law marriage, which grants similar rights to couples who are not officially married.
Common law systems rely on caselaw and legal precedent to guide their decisions, while civil law systems rely primarily on codes and statutes. Civil law systems, which originated in mainland Europe, have clear rules for how judges need to rule for specific disputes.
Common law promotes stability, consistency, and efficiency. It is also adaptable to unforeseen situations and flexible to changes in society.









































