
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. It draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law originated in medieval England and is currently practised in the US, UK, Australia, Canada, Hong Kong, India, and New Zealand. Statutory interpretation is the process by which courts determine the meaning of a statutory provision to apply it to a specific situation. This process involves interpreting the intention of the legislature and applying rules such as the Golden Rule, the Mischief Rule, and the Literal Rule. Judges in common law systems have flexibility in statutory interpretation, and their decisions can shape future interpretations. While civil law provides a comprehensive and codified set of legal statutes, common law allows for adaptability and interpretation, which is increasingly important as technology evolves.
| Characteristics | Values |
|---|---|
| Common law in the US | Originates from medieval England but is still in effect in the US and elsewhere today |
| Common law in the UK | The UK operates under a dual system of both common and civil law |
| Common law in other countries | Practiced in Australia, Canada, Hong Kong, India, New Zealand, and the United Kingdom |
| Common law definition | A body of unwritten laws based on legal precedents established by the courts |
| Common law vs civil law | Civil law is a comprehensive, codified set of legal statutes created by legislators |
| Common law and marginalization | Historically, common law has led to the unfair marginalization or disempowerment of certain groups |
| Statutory interpretation in civil law systems | Judges have flexibility in interpreting statutes and may apply a set of rules or standards |
| Statutory interpretation in common law systems | Judges use past court cases as part of the law of the land and have discretion in interpreting statutes |
| Common law and statutory interpretation | The Golden Rule, the Mischief Rule, and the Literal Rule are used to interpret common law statutes |
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What You'll Learn

Common law's ability to adapt to new situations
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. It draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law originated in medieval England and is still very much in effect in the US and elsewhere today.
Common law is adaptable to new situations and can be applied to cases that were not contemplated at the time of legislation. This adaptability is particularly valuable as technology evolves and plays a growing role in our lives. Common law's flexibility allows for the legal code to be open to interpretation, which becomes increasingly important as technology advances.
In common law systems, legal reasoning is often clearly spelled out in written legal opinions resolving a case. This is partly because there is a need to clarify the law for use in future cases. The interpretation of common law statutes can be guided by rules such as the Golden Rule, the Mischief Rule, and the Literal Rule. However, it is important to note that these rules may not always be sufficient for elucidating complex statutes, and there may be numerous other interpretative criteria to consider.
The flexibility of common law allows judges to interpret and apply the law to the specific facts and circumstances of each case. This flexibility can help prevent unfair verdicts and ensure that criminals do not escape justice. For example, in civil law, a statute may state that driving at an "unreasonable speed" is prohibited, requiring discretionary application to the specific circumstances of a case. In contrast, a common law system might set a specific speed limit, providing a clear rule that is easier to enforce.
However, the flexibility of common law can also lead to outdated or biased decisions that continue to shape future rulings until societal changes prompt a judicial body to overturn the precedent. For instance, in England, common law held that fathers were entitled to custody of children in divorce cases as late as the 1970s, which marginalized women and kept them trapped in marriages.
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Common law vs civil law
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. It draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law originated in medieval England and is practiced today in the US, UK, Australia, Canada, Hong Kong, India, and New Zealand, among others. It is characterized by its adaptability to situations not contemplated at the time of legislation and its ability to leave the legal code open for interpretation.
Civil law, on the other hand, is a comprehensive, codified set of legal statutes created by legislators. It is rooted in the Roman Empire and was disseminated in the 19th century through codes such as France's Napoleonic Code and Germany's Bürgerliches Gesetzbuch. Civil law is the most common legal system globally, practiced in about 150 countries. It relies on legal codes as the primary source of law rather than judicial precedent, and it clearly defines the cases that can be brought to court and the procedures for handling claims.
One key difference between the two systems is their approach to precedent and written decisions. Common law heavily emphasizes precedent, recognizing prior court decisions as legally binding. In contrast, civil law judges tend to give less weight to precedent, and their rulings may not always articulate the legal reasoning behind the decision. Another distinction is the level of prescription; civil law is generally more prescriptive, specifying the cases that can be brought to court and the procedures to follow. In contrast, common law is more flexible, allowing for interpretation and adaptation to new situations.
In terms of contracts, common law places importance on setting out all the terms governing the relationship between the parties within the contract itself, as there are few implied provisions. In contrast, civil law implies various provisions into a contract, such as equal bargaining provisions when one party has a stronger bargaining position. Additionally, in civil law, unless the contract specifies arbitration, it will be enforced by the administrative courts.
While common law and civil law have distinct characteristics, they share the goal of establishing consistent outcomes by applying uniform standards of interpretation. Both systems aim to reduce bias and create order in the legal process.
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Common law in the US and UK
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. It draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law originated in medieval England and spread to North America during the colonial period (17th and 18th centuries). Today, the US and UK operate under a dual system of both common and civil law.
In the US, common law is practiced in all states except Louisiana, which follows a French civil law system. The US common-law system has evolved over time, with judges playing a crucial role in its development. They have the power to interpret and apply the law, as well as establish precedents that guide future decisions. The US Supreme Court, for example, has the authority to interpret the constitution and federal statutes, and its interpretations remain stable as long as they are supported by the majority of the court.
In the UK, common law is practiced in England, Wales, and Northern Ireland, while Scotland has a unique system combining civil law and its own form of common law. The UK's Supreme Court is the final court of appeal for civil cases and can overrule and unify criminal law decisions of lower courts. While the UK has no written constitution, its common law system allows for the evolution of the law to adapt to new situations. For example, the law of negligence has evolved over time, with judges making law and providing rationales that can be balanced with judgment in future cases.
Both the US and UK common-law systems share similarities, such as the principle of equality of the sexes in personal status law and the treatment of economic consequences in divorce law. However, they also exhibit significant differences, particularly in public law. For instance, the US provides greater protection for freedom of speech and a weaker libel law compared to the UK. Additionally, the US has a written constitution and allows judicial review in all courts, whereas England restricts it.
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Common law and marginalisation
Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries. Common law is practised in the United States, the United Kingdom, Australia, Canada, Hong Kong, India, and New Zealand.
The traditions of common law have historically led to the marginalization or disempowerment of certain groups. Past decisions, whether outdated or biased, continue to shape future rulings until societal changes prompt a judicial body to overturn the precedent. This dynamic makes it difficult for marginalized parties to pursue favourable rulings until popular thought or civil legislation changes the interpretation of common law. Feminists in the 19th and early 20th centuries, for example, often faced such difficulties when fighting for women's rights. In England, common law held that fathers were entitled to custody of the children in cases of divorce, effectively keeping women trapped in marriages.
In the context of marginalized legal categories, the law disadvantages individuals or groups by transforming inherently ordered social classifications into consequential legal categories. For example, the laws of intestacy in the United States disproportionately affect individuals of colour and those with less wealth. These individuals may lack access to intestacy-avoidance mechanisms, impacting their socioeconomic outcomes. Race and ethnicity also play a role, with multigenerational households more common among Black, Hispanic, and immigrant families. The distribution of family structures marginalized by intestacy laws may vary across sociodemographic groups, raising the possibility that these laws violate individuals' rights to equal protection.
In housing, marginalization can manifest as obstacles to accessing social housing and having one's voice heard, even in the aftermath of tragic events like the Grenfell Tower fire. Marginalization can also occur due to an individual's status as a 'foreigner' in a particular country, subjecting them to a 'hostile environment'.
Common law's ability to leave the legal code open for interpretation can be valuable, allowing the law to adapt to new situations not contemplated by the legislature. However, it is important to recognize that common law's reliance on precedents can perpetuate marginalization until societal changes prompt a reevaluation of those precedents.
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Statutory interpretation rules
In common law systems, there is a need to clarify the law for future cases, so legal reasoning is often clearly spelled out in a written legal opinion. In civil law systems, rulings tend to articulate their legal reasoning less fully. This makes it more challenging to understand the process of statutory interpretation in a civil law decision based on written court rulings alone.
Statutory interpretation, or statutory construction, is the process of determining what a particular statute means so that a court may apply it accurately. While the words of a statute may sometimes have a plain meaning, in many cases, there is ambiguity in the wording that must be resolved by a judge. Judges use various tools for statutory interpretation, including traditional canons of construction, legislative history, and purpose.
To determine a statute's original intent, courts first look to the words of the statute and apply their usual and ordinary meanings. If the meaning of the statute remains unclear, courts attempt to ascertain the intent of the legislature by looking at legislative history and other related sources. This includes the common usage of a word, case law, dictionaries, parallel reasoning, and punctuation.
In the United States, there are two main theories of statutory interpretation: purposivism and textualism. While both approaches may use the same tools, a judge's theory of statutory construction may influence the order in which these tools are applied and the weight given to each.
In the United Kingdom, judges must follow certain Statutory Interpretation rules when trying criminal cases under the Common Law system. These rules prevent laws from being interpreted literally, which could lead to unfair verdicts and criminals escaping justice.
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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. Common law draws from institutionalized opinions and interpretations from judicial authorities and public juries.
Statutory law, or civil law, 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 punishment for an offense.
Common law and statutory law can interact in a few ways. In some cases, common law can be used to interpret statutory law, especially in common law jurisdictions like the UK and US. In other cases, statutory law may take precedence over common law, especially if the legislation is more recent or specifically addresses a conflict between the two.
Using common law to interpret statutory law can provide flexibility and context to the interpretation of statutes. It can help to clarify the law for future cases and ensure that the "intention of Parliament" is carried out.
One potential drawback of using common law to interpret statutory law is that it can be more difficult to understand the legal reasoning behind a decision, as the interpretation may be based on past court cases rather than written statutes. Additionally, the use of common law can sometimes lead to outdated or biased decisions that marginalize certain groups.





































