
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 many other countries, including the United States, Canada, India, and Australia. Common law is deeply rooted in the principle of stare decisis, which means that courts and judges need to follow earlier decisions and rulings when dealing with similar cases. This promotes stability and consistency in the legal system. Common law is flexible and can respond to changes in society, as judges are empowered to resolve issues and establish new precedents in cases of first impression.
| Characteristics | Values |
|---|---|
| Definition | "Body of law" based on court decisions rather than codes or statutes |
| Other names | Judicial precedent, judge-made law, case law |
| Origin | England during the Middle Ages |
| Basis | Precedent, i.e. judicial rulings made in previous similar cases |
| Current usage | The US, Canada, India, Australia, Hong Kong, New Zealand, the UK |
| Pros | Stability, consistency, flexibility |
| Cons | Past decisions continue to shape future rulings until societal changes prompt a judicial body to overturn the precedent |
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What You'll Learn

Common law is flexible and adaptable
Common law is a legal system that primarily relies on judicial decisions and precedent to guide future legal decisions, rather than depending on a body of statutes or written rules. This is in contrast to civil law systems, which centre around a comprehensive code of statutes that outline the procedures for handling claims and the punishments for offences.
Secondly, common law is adaptable to unforeseen situations. When lawmakers create statutes, they cannot predict all the scenarios in which courts may need to apply the laws. Common law systems address this issue by allowing courts to adapt the law to situations not originally contemplated by the legislature. This adaptability is particularly important as technology continues to evolve and play a greater role in our lives, as it allows for the interpretation of laws in new contexts.
Thirdly, common law is flexible in that it allows for some freedom of interpretation. While common law systems value precedent, they do not have a formal legal code, and so the law is open to interpretation by judges and juries. This flexibility can be a double-edged sword, as it allows for the consistent application of standards but also introduces the possibility of bias.
Overall, the flexibility and adaptability of common law are some of its key strengths. These features allow common law systems to respond to changes in society, adapt to new situations, and interpret the law in ways that are relevant to the present context.
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Common law is deeply rooted in stare decisis
Common law is a legal system that is deeply rooted in stare decisis. The term "common law" refers to a body of law that is primarily developed through judicial decisions rather than statutes. It is a system of law that is based on precedent, where judicial rulings made in previous similar cases are followed and applied to new cases. This is in contrast to civil law systems, which rely primarily on codes and statutes.
Stare decisis is a Latin phrase that means "to stand by things decided". It is the doctrine that courts will adhere to precedent in making their decisions. In other words, when a court faces a legal argument, it will rule in alignment with a previous court's decision if that court had ruled on the same or a closely related issue. The previous deciding court must have binding authority over the current court for this to apply; otherwise, the previous decision is merely persuasive.
There are two types of stare decisis: horizontal and vertical. Horizontal stare decisis refers to a court adhering to its own previous decisions, while vertical stare decisis refers to a court adhering to the decisions of a higher court. For example, if the Seventh Circuit Court of Appeals followed a previous ruling from the U.S. Supreme Court, that would be an example of vertical stare decisis.
The principle of stare decisis promotes stability and consistency in the law. It ensures that the law won't change randomly and allows society to assume that fundamental beliefs are based on the law rather than people's preferences. It also lessens the need for subsequent litigation, saving time and energy for the judiciary. Additionally, stare decisis prevents judges from acting arbitrarily or with bias by requiring them to follow existing precedents.
The modern practice of applying case law as precedent began with Jeremy Bentham's attack on the legitimacy of the common law. This made obsolete the declaratory theory of common law that prevailed in Blackstone's era. Today, common law systems are used in many countries around the world, including the U.S., Canada, India, and Australia.
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Common law is unwritten law
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 is Latin for "to stand by things decided". This means that 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.
Common law originated in England during the Middle Ages and was spread to other parts of the world, including Wales, Ireland, and various colonies, by the British Empire. Many former colonies, including the United States, Canada, India, and Australia, continue to rely heavily on common law when resolving legal disputes.
In a common law system, there is no official legal code that can be directly applied to a case. Instead, judges determine which precedents to apply in deciding each new case. This allows for flexibility and adaptation to changing circumstances. For example, in the concept of "fair use" in copyright law, the application of fair use is based on a set of unwritten principles that have developed through court decisions over time.
While common law is unwritten, it is important to note that it may incorporate certain statutes and is not completely separate from written law. Common law promotes stability and consistency because everyone involved knows that the outcome will be based on previous case law rather than subjective viewpoints.
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Common law is judge-made law
Common law, also known as judicial precedent, judge-made law, or case law, is a body of law primarily developed through judicial decisions rather than statutes. It is deeply rooted in stare decisis, which means "to stand by things decided". This means that judges are bound by the decisions and rulings made in previous similar cases.
The term "judge-made law" was introduced by Jeremy Bentham as a criticism of the pretense of the legal profession. In modern usage, common law is understood to mean law that is made by judges, not the declaratory statutes of Blackstone's era. Common law is flexible, as it can respond to changes in society. It is also inherently evolutionary, developing gradually through the accumulation of decisions in individual cases, allowing the legal system to address new problems without waiting for legislative action.
In a ""case of first impression", with no precedent or clear legislative guidance, judges are empowered to resolve the issue and establish new precedent. Judges shape the law by interpreting statutes and filling gaps where legislation is silent or ambiguous. However, their decision-making is constrained by precedent and statutory interpretation.
The early development of case law in the 13th century has been traced to Bracton's On the Laws and Customs of England, with the first extant Year Book published in 1268. These Year Books are a principal source of knowledge regarding the developing legal doctrines, concepts, and methods from the 13th to the 16th centuries, when common law developed into a recognizable form.
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Common law is a body of customary law
Common law, also known as case law, is a body of unwritten laws based on custom, usage, and precedent. It is a system of law that primarily develops through judicial decisions rather than statutes. Common law originated in England during the Middle Ages and spread to Wales, Ireland, and the British colonies, including North America. Today, many countries, including the US, Canada, India, and Australia, continue to rely heavily on common law in their legal systems.
Common law is deeply rooted in the principle of stare decisis, which means "to stand by things decided." In practice, this means that judges in common law systems must follow previous court decisions, or precedent, when dealing with similar cases. This is in contrast to civil law systems, which rely primarily on codes and statutes created by legislators. While civil law systems have clear rules for how judges should rule in specific disputes, common law systems are more flexible and can address situations not originally predicted by lawmakers.
The evolution of common law occurs through a series of gradual steps, allowing the law to change substantially over time without sharp breaks. This reduces disruptive effects and promotes stability and consistency in the legal system. Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries. It is important to note that common law is not the only legal system in use today, and many countries use a combination of common law and civil law.
The term "judge-made law" is associated with Jeremy Bentham, who criticized the legitimacy of common law. This modern practice of applying precedent from case law made obsolete the declaratory theory of common law that prevailed in William Blackstone's era. Blackstone defined common law as deriving its authority from immemorial usage and "universal reception throughout the kingdom." Despite the evolution of the term, common law remains a significant aspect of legal systems worldwide, influencing the decision-making process in unusual cases and shaping the legal landscape.
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Frequently asked questions
Common law is a body of law unwritten laws based on legal precedents established by the courts. It is also known as case law or judge-made law.
Civil law is a comprehensive, codified set of legal statutes created by legislators. Civil law systems rely primarily on codes and statutes, whereas common law systems rely on case law and legal precedent to guide their decisions.
Common law originated in England during the Middle Ages and was spread to its colonies. Today, common law is used in several countries around the world, including the U.S., Canada, India, Australia, and New Zealand.
Common law promotes stability and consistency in the legal system. It is also flexible, as it can respond to changes in society without requiring changes to statutes or codes.





































