
Common law is a body of law based on court decisions and judicial opinions, rather than statutes or codes. It is a system of law that has evolved over time, influenced by previous rulings and case law, with the principle of stare decisis ('to stand by things decided') at its core. Common law promotes stability and efficiency as it provides a framework for judges to follow precedent, ensuring consistency in outcomes and saving time and money. It is adaptable to unforeseen situations, allowing courts to address issues not predicted or covered by lawmakers. This body of law has its origins in England, dating back to the Middle Ages and the period after the Norman Conquest of 1066, and has since evolved and spread, forming the basis of legal systems in the United States and many Commonwealth countries.
| Characteristics | Values |
|---|---|
| Definition | A "body of law" based on court decisions rather than codes or statutes |
| Basis | Judicial decisions or opinions |
| Evolution | Judges have "made law" for hundreds of years |
| Pros | Stability, consistency, efficiency, adaptability to the unforeseen |
| Cons | Complexity |
| Jurisdiction | Several stages of research and analysis are required to determine "what the law is" in a given situation |
| Binding | Decisions of a court are binding only in a particular jurisdiction |
| Codification | Legislatures may codify common law rules to give them permanence or modify them |
| Influence | The common law of England has influenced the legal systems of the United States, Commonwealth countries, and other countries |
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What You'll Learn

Common law is based on court decisions, not statutes
Common law is a body of law based on court decisions or precedents, also known as caselaw, rather than statutes or codes. It is a system of law that has evolved over time, with its roots in English law, dating back to the Middle Ages and the period after the Norman Conquest of 1066. The decisions of previous courts, particularly higher courts, are binding on lower courts dealing with similar cases later on. This principle is known as stare decisis, which translates from Latin to mean "to stand by things decided".
In a common law system, judges play a crucial role in shaping the law. They interpret and apply the law, considering the facts and circumstances of each case, and their decisions become precedents for future cases. This process allows the law to adapt to new and unforeseen situations, ensuring stability and consistency in the legal system. It also provides guidance and predictability for individuals and businesses, allowing them to make informed decisions about their actions' legality.
While common law is based on court decisions, it is important to note that legislatures can also play a role in codifying and modifying these decisions. In some cases, legislatures may choose to codify common law rules into statutes, giving them permanence or making modifications to expand or restrict their scope. This interplay between court decisions and legislative action ensures that the law remains dynamic and responsive to the changing needs of society.
The evolution of the law of negligence provides an example of how common law adapts and changes over time. The traditional common law rule during the 19th century required privity of contract for a plaintiff to recover for a defendant's negligent production or distribution of a harmful instrumentality. However, this rule evolved, and the concept of “foreseeable danger” became a crucial factor in determining liability, shifting the focus from contractual relationships to the knowledge of probable danger.
In summary, common law is a dynamic legal system that adapts and evolves through court decisions, judicial interpretation, and the creation of precedents. While statutes and legislative action can influence common law, the system's foundation lies in the principles of stare decisis and the reliance on previous court rulings to guide future judgments.
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Common law promotes stability and consistency
Common law is a body of customary law based on judicial decisions or caselaw, rather than statutes or codes. It has its origins in English law, which was largely created after the Norman Conquest of 1066, and has since evolved into the legal systems found in the United States and most Commonwealth countries.
At its core, common law promotes stability and consistency. This is because all involved know that the outcome of a case will be based on previous caselaw, rather than subjective viewpoints. This stability and consistency are also supported by the principle of stare decisis, which means "to stand by things decided". In other words, courts and judges must follow previous decisions and rulings when dealing with similar cases. For example, in the United States, federal common law is created and applied by federal courts in the absence of any controlling federal statute.
The reliance on judicial opinion in common law systems is a significant strength, providing a robust framework for commercial systems in countries like the United Kingdom and the United States. With reasonably precise guidance on most issues, parties can predict the legality of their actions and plan accordingly. This predictability allows commercial contracts to be more economically efficient and create greater wealth.
The common law also provides stability and consistency through its adaptability to unforeseen situations. While lawmakers cannot predict every scenario when creating statutes and rules, common law courts can address situations not originally foreseen. This ensures that the law can adapt and provide clarity in novel or complex cases.
Furthermore, the evolution of common law over time contributes to its stability and consistency. Judges have "made law" for centuries, and the reasons given for decisions are often more important than the specific outcomes of cases. Judicial opinions are typically lengthy, providing rationales and policies that can be balanced with judgment in future cases. This allows for the gradual evolution of the law, as seen in the example of changing liability for negligence over the 19th century.
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Common law is adaptable to unforeseen circumstances
Common law is a body of law based on court decisions rather than codes or statutes. It is derived from judicial decisions and embodied in reports of decided cases. It has been administered by the courts of England since the Middle Ages and has evolved into the legal systems found in the United States and most Commonwealth countries.
For example, the common law rule on liability for negligence evolved gradually over time. Initially, a plaintiff could not recover for a defendant's negligent production or distribution of a harmful instrumentality unless they were parties to a contract. However, in the 1842 English case of Winterbottom v Wright, the court recognized that there would be "'absurd and outrageous consequences' if this rule were applied too broadly. As a result, the court drew a new line, requiring that there must be knowledge of a probable danger, rather than merely a possible one.
Another example of the adaptability of common law is the 2018 California Supreme Court decision in Dynamex Operations West, Inc. v. Superior Court. This decision articulated a three-part test for determining whether California workers were independent contractors or employees, which was subsequently codified and expanded upon by the California Legislature in a new section of the Labor Code.
The evolution of common law is in the hands of judges, who have "made law" for hundreds of years. This allows for adaptability to unforeseen circumstances, as judges can balance the reasons and rationales of previous decisions with the unique facts and circumstances of new cases.
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Common law is derived from judicial decisions
Common law is a body of customary law based on judicial decisions or case law, rather than statutes or codes. It is a system of law that has evolved over time through judicial decisions and opinions, with judges creating and adapting laws to address new situations and scenarios. This evolution of common law is primarily driven by judges, who have been "making law" for centuries.
The central principle of common law is stare decisis, a Latin phrase that means "to stand by things decided". This principle requires judges and courts to follow previous decisions, rulings, and precedents when dealing with similar cases. For example, if a court rules on a specific set of facts, that decision becomes binding for future cases with the same or similar issues. This consistency and stability provided by stare decisis allow for predictability in the law, enabling individuals and businesses to plan their actions with a reasonable understanding of their legality.
The common law system originated in England after the Norman Conquest of 1066, evolving from local customs and Anglo-Saxon law. Over time, this system spread and influenced the legal systems of the United States and other Commonwealth countries. While the United Kingdom now consists of multiple distinct legal systems, the common law system of England and Wales continues to be a significant contributor to the robust commercial systems in the UK and the US.
In a common law system, the process of determining "what the law is" involves several stages of research and analysis. It includes ascertaining the facts, locating relevant statutes and cases, extracting principles and analogies, and predicting how a court is likely to rule based on past decisions. While the decisions of higher courts carry more weight, the evolution of common law is a gradual process, with judges adapting and refining laws over time.
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Common law is based on the principle of stare decisis
Common law is a body of law based on court decisions rather than codes or statutes. It promotes stability and consistency because everyone involved knows that the ultimate outcome will be based on previous case law, not on subjective personal viewpoints. Common law is efficient because judges need only follow precedent when making decisions, saving everyone time and money. It is also adaptable to the unforeseen—when lawmakers create statutes and rules, they cannot predict all the situations in which courts may need to apply the laws.
At the heart of common law is a legal principle known as stare decisis, a Latin phrase that roughly translates to "to stand by things decided". In practice, this means that courts and judges need to follow earlier decisions and rulings, or case law, when dealing with similar cases later. For example, if a court makes a particular decision based on a specific set of facts, that court is then required to follow that decision when ruling on the same or closely related issues in the future.
The doctrine of stare decisis itself developed at common law and has greater legal and practical significance in the common-law context. Common law is considerably more complicated than the simplified system described above. 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, decisions made by higher courts, like a jurisdiction's supreme court, are typically binding on lower courts in the same jurisdiction.
Common law is derived from judicial decisions instead of statutes. American courts originally fashioned common-law rules based on English common law until the American legal system was mature enough to create common-law rules from direct precedent or by analogy to comparable areas of decided law. At the state level, legislatures often subsequently codify common-law rules from the courts of their state, either to give the rule the permanence afforded by a statute or to modify it in some way.
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Frequently asked questions
Common law is a body of law based on court decisions rather than codes or statutes. It is derived from judicial decisions and embodied in reports of decided cases.
Common law promotes stability and consistency because everyone involved knows that the ultimate outcome will be based on previous case law. It also allows for efficiency, adaptability, and the ability to predict outcomes.
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, extracting principles and analogies, and determining how the next court will rule based on past decisions.
Under common law rules, an individual is considered an employee if the employer has the right to control what will be done and how it will be done, regardless of the employment label. This determination considers the degree of control and independence in the relationship between the worker and the business.





















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