
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 following the Norman Conquest in 1066 and has since spread to various parts of the world, including the United States, Australia, Canada, and India. In a common law system, judges rely on previous court rulings, known as precedents, to guide their decisions in similar cases. This promotes stability and consistency in the legal system. Common law is flexible and adaptable, allowing courts to address unforeseen situations not covered by written statutes. It is deeply rooted in the principle of stare decisis, which means to stand by things decided. While common law has been associated with the marginalization of certain groups, it also serves as a basis for new legislation and contributes to the robustness of commercial systems in countries like the United Kingdom and the United States.
| Characteristics | Values |
|---|---|
| Basis | Legal precedents established by the courts |
| Type of law | Unwritten laws |
| Influence | Decisions in unusual cases where the outcome cannot be determined based on existing statutes or written rules of law |
| Evolution | Gradual steps over a decade or more, reducing disruptive effects |
| Jurisdiction | England, Wales, Northern Ireland, Scotland, the United States, Canada, Australia, Hong Kong, India, and New Zealand |
| Rulings | Based on previous caselaw, not subjective personal viewpoints |
| Efficiency | Shorter court proceedings, saving time and money |
| Adaptability | Addresses unforeseen situations not predicted by lawmakers |
| Flexibility | Responds to changes in society without requiring changes to statutes and codes |
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What You'll Learn
- Common law is a body of unwritten laws based on legal precedents
- Common law is deeply rooted in stare decisis, which means to stand by things decided
- Common law is flexible and adaptable to unforeseen situations
- Common law promotes stability and consistency
- Common law is not the only type of legal system used today. Civil law is another

Common law is a body of unwritten laws based on legal precedents
Common law is also known as case law, and it is a significant aspect of the legal systems in many countries, including the United States, the United Kingdom, Australia, Canada, Hong Kong, India, and New Zealand. It originated in England following the Norman Conquest in 1066 and gradually supplanted local folk courts and manorial courts, establishing a unified legal system.
In a common law jurisdiction, determining "what the law is" in a given situation involves several stages of research and analysis. It requires ascertaining the facts, locating relevant statutes and cases, extracting principles and analogies, and considering how these might influence the ruling in the current case. The decisions of higher courts or legislatures are generally given more weight than those of lower courts.
The common law is adaptable and flexible, as it can respond to changes in society without requiring lawmakers to pass changes in statutes and codes. This flexibility allows the law to be applied to situations that were not contemplated at the time the original legislation was created. For example, in the United States, common law has influenced the development of commercial contracts, providing greater efficiency and wealth creation as parties can be confident in the legality of their arrangements.
However, the traditions of common law have also led to the unfair marginalization or disempowerment of certain groups. Past decisions, even if outdated or biased, continue to shape future rulings until societal changes prompt a judicial body to overturn the precedent. For example, in England, common law held until the 1970s that fathers were entitled to custody of children in cases of divorce, effectively keeping women trapped in marriages.
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Common law is deeply rooted in stare decisis, which means to stand by things decided
Common law is a body of unwritten laws based on legal precedents established by the courts. It is a system of law that promotes stability and consistency, as it is based on the principle of stare decisis, which means "to stand by things decided". This means that judges in common law systems rely on previous rulings and decisions, or case law, to determine the outcome of a current case. This gives the law consistency and makes interpretations of the law more predictable.
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, and extracting the principles, analogies, and statements by various courts. The decisions of higher courts or legislatures carry more weight than those of lower courts, and the example set by higher courts is binding on cases tried in lower courts.
The stare decisis concept can be divided into horizontal and vertical components. Horizontal stare decisis refers to the idea that a court will follow its own prior decisions unless there are exceptional circumstances. Vertical stare decisis, on the other hand, refers to the idea that lower courts must adhere strictly to the decisions of higher courts within the same jurisdiction. This is deeply entrenched in the American legal system and is part of what makes the Supreme Court "supreme".
The common law system is flexible and adaptable to unforeseen situations, as it allows judges to address situations not originally predicted by lawmakers. However, the reliance on past decisions can also lead to the marginalization or disempowerment of certain groups, as past decisions may be outdated or biased. In such cases, judges may offer reasons or legal nuances to avoid following precedential decisions or to overturn prior rulings.
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Common law is flexible and adaptable to unforeseen situations
Common law is a body of 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". This means that common law is typically reliant on past cases and rulings to determine the outcome of a similar case in the present.
However, common law is not rigidly bound by past decisions and is flexible and adaptable to unforeseen situations. When lawmakers create statutes and rules, they cannot predict all the situations in which courts may need to apply the laws. Common law systems address this by empowering judges to resolve issues and establish new precedents in "cases of first impression" with no clear legislative guidance. This flexibility allows common law to respond to changes in society and encourages good judgement. For example, in the case of R (Soma Oil and Gas Ltd) v Director of the SFO, the judge chose to consider the economic consequences of a judgement that put legal principle before pragmatism, demonstrating the adaptability of common law to the specific circumstances of a case.
Common law evolves through a series of gradual steps, allowing the law to change substantially over time without sharp breaks that could cause disruptive effects. This incrementalism is in contrast to the legislative process, which is often difficult and time-consuming. The flexibility of common law also means that it can inspire new legislation to be enacted. For example, conspiracy as a legal concept was invented by courts in the 19th century to address contemporary problems of fraud, and later became the basis for new legislation.
In summary, common law is flexible and adaptable to unforeseen situations through its reliance on legal precedents, its ability to establish new precedents, and its incremental evolution. This flexibility allows it to respond to changes in society and encourage good judgement in the face of unpredictable situations.
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Common law promotes stability and consistency
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 and has since spread to other countries, including the United States, Canada, India, and Australia. The principle of stare decisis, which means "to stand by things decided," is central to common law. This means that judges in common law systems are bound by previous decisions and rulings, or caselaw, when dealing with similar cases. This promotes stability and consistency in several ways:
Firstly, common law provides a predictable outcome for all involved. Judges in common law systems base their decisions on previous caselaw rather than subjective, personal viewpoints. This predictability allows parties, especially commercial entities, to anticipate the legality of their actions and make more informed decisions. For example, commercial contracts may be more economically efficient because the parties involved can structure their agreements within the boundaries of the law with greater certainty.
Secondly, common law offers efficiency in court proceedings. Judges in common law systems can save time and resources by relying on established precedents when making decisions, eliminating the need for lengthy and costly trials. This efficiency is particularly advantageous when addressing situations not originally predicted or addressed by existing statutes. In such cases, common law judges can adapt and create new precedents to resolve issues, contributing to the overall stability and consistency of the legal system.
Additionally, common law evolves gradually over time, reducing disruptive effects. Instead of abrupt changes, common law systems allow for incremental adjustments to the law, ensuring that societal shifts are reflected in legal interpretations. This adaptability to changing societal norms and values helps maintain stability and consistency in the application of the law.
However, it is important to acknowledge that the reliance on precedent in common law systems can also lead to the marginalization or disempowerment of certain groups. Outdated or biased past decisions may continue to shape future rulings until societal changes prompt a judicial body to overturn the precedent. This dynamic can make it challenging for marginalized groups to secure favorable rulings until societal attitudes or civil legislation evolve, leading to necessary changes in the interpretation of common law.
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Common law is not the only type of legal system used today. Civil law is another
Common law is a body of 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 evolves through a series of gradual steps, gradually working out the details, so that over a decade or more, the law can change substantially without a sharp break, thereby reducing disruptive effects. This makes common law flexible and adaptable to unforeseen situations.
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 locate any relevant statutes and cases, and then extract the principles, analogies, and statements by various courts. 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.
However, common law is not the only type of legal system used today. Civil law, which is based on comprehensive, codified sets of legal statutes created by legislators, is another widely adopted system. In a civil law system, a legislator drafts a law and writes it into the code, and a court is required to follow that code. While a court's interpretation of a legal code does not bind it, and it may later interpret the law differently, civil law codes are generally comprehensive codes, meaning that anything not in the code is not law. This provides clarity on the cases that can be brought to court, the procedures for handling claims, and the punishment for an offense.
The two main legal systems used today throughout the world are common law and civil law systems. Many countries that were formerly under English rule, including the United States, follow common law. In contrast, most continental European countries have comprehensive codes and follow civil law. In some jurisdictions, both common law and civil law have some influence. For example, in the United States, there are legal codes in every state, and the federal government follows common law.
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Frequently asked questions
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 the principle of stare decisis, which means "to stand by things decided".
Common law relies on detailed records of previous cases and statutes as there is no official legal code. Judges determine which precedents apply to a particular case, and courts follow these precedents when dealing with similar cases in the future.
Common law promotes stability and consistency as outcomes are based on previous caselaw rather than subjective viewpoints. It is also flexible and adaptable to unforeseen situations as it can respond to changes in society without requiring changes to statutes.
Common law is practised in several countries, including Australia, Canada, Hong Kong, India, New Zealand, the United Kingdom, and the United States. It originated in England following the Norman Conquest in 1066 and was later spread by the British Empire.
Common law is based on past judicial opinions and precedents, while statutory law (also known as civil law) is based on current written statutes or codes. Statutory law is strict in its application, while common law allows for interpretation and can be modified or overturned if it becomes outdated or irrelevant.







































