
Common law and civil law are two distinct legal systems with different approaches to the law. Common law, prevalent in countries like the United States, England, and Wales, is based on judicial precedent and originated in medieval England. On the other hand, civil law, practiced in continental Europe and former colonies of France, Germany, and Spain, is rooted in Roman law and relies on a codified system with legal codes. Despite their differences, both systems share similarities and influences, with European courts adopting English legal terminology and concepts, and common law countries like the United States sharing similarities with civil law in their respect for precedent.
| Characteristics | Values |
|---|---|
| Influence | Common law is influenced by England and civil law by continental Europe. |
| Legal system | Both common law and civil law are legal systems. |
| Judicial decisions | Judicial decisions are binding in both common law and civil law. |
| Goal | Both common law and civil law aim to establish consistent outcomes by applying the same standards of interpretation. |
| Precedent | Common law relies on stare decisis, a history of judicial decisions that form the basis of evaluation for future cases. |
| Application | Common law is applied in former British colonies or protectorates, including the United States, while civil law is practiced in much of Europe and elsewhere. |
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What You'll Learn

Both aim for consistent outcomes
Common law and civil law are the two most widely used legal systems in the world. Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. Civil law, on the other hand, is a comprehensive, codified set of legal statutes created by legislators. Despite their differences, both common law and civil law aim for consistent outcomes.
In common law jurisdictions, such as the United States, England, and Wales, judges rely on detailed records of similar situations and statutes to guide their decisions when there is no official legal code that directly applies to a case. This reliance on precedent, known as stare decisis, promotes stability and consistency in the legal system. Lower courts generally follow the example set by higher courts, although they may deviate from precedents if they are outdated or if the current case differs substantially from the precedent case.
Civil law, practiced in much of Europe and elsewhere, also aims for consistency in the application of the law. Civil law is regularly updated with the goal of creating standardized codes to reduce bias and ensure that laws are applied uniformly across cases. While civil law is based on legal codes rather than judicial precedent, the interpretation of these codes by courts can evolve over time, leading to a certain level of consistency in decision-making.
Both common law and civil law recognize the importance of consistent outcomes in their respective systems. While they achieve this consistency through different means, such as judicial precedent in common law and standardized codes in civil law, the underlying goal remains the same. This shared objective of consistency contributes to the effective functioning of the legal systems and helps provide clarity and predictability in legal decision-making.
It is worth noting that while consistency is a key aim, the specific characteristics of each system, such as the emphasis on precedent in common law and the reliance on codified statutes in civil law, can lead to variations in how this consistency is achieved and the degree of flexibility allowed within each system.
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Both are widely used legal systems
Common law and civil law are the two most widely used legal systems in the world. Common law is a body of unwritten laws based on legal precedents established by the courts. It originated in medieval England and is currently used in many countries that were formerly under English rule, including the United States. Common law systems are less prescriptive, with greater flexibility in granting different types of security over assets. They also have the concept of trusts, which is absent in civil law systems.
Civil law, on the other hand, is a comprehensive, codified set of legal statutes created by legislators. It is practised in much of Europe and elsewhere in the world. Civil law is regularly updated, and the goal of standardised codes is to create order and reduce bias in the system. While civil law is based on legal codes, it does not rely on judicial precedent, meaning that prior court decisions are not binding on future cases.
Both common law and civil law aim to establish consistent outcomes by applying the same standards of interpretation. In common law countries, judges can make laws in certain areas, whereas civil law jurisdictions tend to appoint graduates straight out of university to become judges. The US operates under a dual system of both common and civil law. Louisiana is the only US state that uses civil law due to its historical settlement by the French, who developed Louisiana law based on French civil law.
The main difference between common and civil law lies in their approaches to precedent and legal codes. Common law relies on stare decisis, which means that judicial decisions are binding and can only be overturned by the same court or through legislation. In contrast, civil law is based on legal codes drafted by legislators, which courts are required to follow. However, the interpretation of these codes is not binding, and courts may interpret and apply them differently in future cases.
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Both are influenced by precedent
Common law and civil law are two distinct legal systems with different approaches to precedent. Common law, prevalent in countries with a history of English rule like the US and UK, is a body of unwritten laws based on legal precedents established by the courts. In common law, judges can create laws in certain areas, filling in the details of ambiguous statutes over time. This is done through the use of stare decisis, or deference to previously published judicial opinions, where a history of judicial decisions forms the basis for evaluating future cases. For instance, in the US, case law developed by judges in individual cases can establish a precedent that will be followed by other judges in similar cases.
Civil law, on the other hand, is practiced in much of Europe and is based on comprehensive, codified sets of legal statutes created by legislators. In civil law systems, a legislator drafts and writes the law into a code, which the courts are required to follow. While prior court decisions are not binding in civil law, the interpretation of a legal code by a court can influence future interpretations of the same code.
Despite their differences, both common law and civil law systems are influenced by precedent to some extent. Common law systems have a stronger tradition of relying on precedent, with detailed records of similar situations and statutes guiding future rulings. Civil law systems, while primarily based on written codes, can be influenced by judicial interpretations and precedents from other civil law countries. For example, French civil law has influenced the legal system of Louisiana in the US. Additionally, both systems aim for consistency and standardized outcomes in their application of the law.
The appointment of judges also influences the precedent-setting process in both systems. In common law jurisdictions, judges are typically appointed after successful legal careers, bringing their legal experience and worldview to bear on interpreting and applying precedent. In civil law jurisdictions, judges are often appointed straight out of university, potentially impacting their interpretation of precedents as they may have less practical legal experience.
Overall, while common law and civil law systems differ in their reliance on precedent, both are influenced by historical decisions, judicial interpretations, and the appointment of judges, resulting in a dynamic interplay between tradition and innovation in the law.
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Both are flexible
Common law and civil law are the two most widely used legal systems in the world. Common law is a body of unwritten laws based on legal precedents established by the courts. Civil law, on the other hand, is a comprehensive, codified set of legal statutes created by legislators. Despite their differences, both legal systems exhibit a degree of flexibility.
Common law, also known as case law, is based on stare decisis, which means that judicial decisions are binding. In other words, the decisions of higher courts are generally followed by lower courts when dealing with similar cases. However, lower courts are not entirely bound by stare decisis and can modify, deviate from, or even overturn precedents in certain circumstances. For example, if a precedent is outdated or substantially different from the current case, a lower court may choose to interpret and apply the law differently. This flexibility allows common law to adapt to changing circumstances and societal values.
Civil law, while based on written legal codes, also allows for flexibility in its application. In civil law jurisdictions, such as those influenced by continental European legal systems, judges have some discretion in interpreting and applying the law. For example, in French law, a judge may deviate from the strict application of a contractual penalty clause and adjust the amount of penalties as long as they do not fall below the actual damage suffered. This flexibility in civil law allows for a degree of judicial discretion and the consideration of specific case circumstances.
The flexibility in both common and civil law systems is further demonstrated in their ability to adopt and incorporate each other's features. Common law systems, rooted in England and practiced in countries with historical ties to English rule, have influenced and been influenced by civil law systems. For instance, common law countries have adopted certain civil law concepts, such as the recognition of non-ceremonial marriages, also known as common-law marriages. Similarly, civil law systems have incorporated aspects of common law, such as the citing of English case law and the adoption of legal terminology. This exchange highlights the adaptability and flexibility inherent in both legal systems.
Additionally, both common and civil law systems can be flexible in their approach to specific legal areas. For example, in the context of financial trouble for businesses, common law jurisdictions tend to emphasize reorganization to keep the business as a going concern. In contrast, civil law jurisdictions traditionally focus on liquidation. However, reforms in civil law countries, such as France, now permit reorganizations of debtors before liquidation, demonstrating a flexible approach to bankruptcy laws. This flexibility allows both legal systems to evolve and adapt their practices to meet changing societal and economic needs.
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Both are used in the US
The United States operates under a dual system of both common and civil law. Common law, also known as case law, is a body of unwritten laws based on legal precedents established by the courts. In common law countries, judges can make laws in certain areas. For example, in the US, the 49 states and the federal government use common law.
Civil law, on the other hand, is a comprehensive, codified set of legal statutes created by legislators. It is regularly updated, and its goal is to create order and reduce bias in the system. Louisiana uses civil law because it was historically settled by the French, who developed Louisiana law based on French civil law.
The US Constitution is not considered part of common law, but it embraces common law traditions. The US legal system was built upon an English common law system, and the Founding Fathers likely assumed that judges would fill in the details over time. This interpretation of the Constitution tends to align with more liberal ideas.
The US is unique in that law school is a graduate program, whereas in other common law countries, such as the UK, judges are usually appointed after successful legal careers. The US shares this feature with civil law countries, which tend to appoint judges who are recent graduates.
Both common law and civil law aim to establish consistent outcomes by applying the same standards of interpretation. In the US, the difference between common and civil law does not generally affect most Americans in their everyday lives.
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Frequently asked questions
Common law and civil law are legal systems. Common law is based on judicial precedent and is used in countries that were formerly under English rule, including the US (except Louisiana) and England and Wales. Civil law is based on legal codes and is used in many countries in continental Europe, Central and South America, and Central and Eastern Europe and East Asia.
One similarity between common law and civil law is that they are the two most widely used legal systems in the world. Another similarity is that both systems have been influenced by each other over time. For example, English law has influenced civil law in Europe, and vice versa.
In the common law system, there are few provisions implied into a contract, so it is important to set out all the terms governing the relationship between the parties in the contract itself. Civil law systems, on the other hand, have more provisions implied into a contract by law, so less importance is placed on setting out all the terms in the contract.
In common law, judges are typically appointed after successful legal careers, and they often defer to previously published judicial opinions (precedent) when making decisions. In civil law, judges are usually appointed straight out of university, and while civil law is generally considered more rule-based and rigid, judges can still interpret the law and overrule precedents.
The difference between common law and civil law generally does not affect most people's everyday lives, especially in the US, where both systems are used across different states.





























