Legal systems around the world vary greatly, but they usually follow civil law or common law. In common law, past legal precedents or judicial rulings are used to decide cases at hand. Under civil law, codified statutes and ordinances rule the land. Some countries like South Africa use a combination of civil and common law.

Comparison chart

Civil Law versus Common Law comparison chart
Edit this comparison chartCivil LawCommon Law
Legal System Legal system originating in Europe whose most prevalent feature is that its core principles are codified into a referable system which serves as the primary source of law. Legal system characterized by case law, which is law developed by judges through decisions of courts and similar tribunals.
Role of judges Chief investigator; makes rulings, usually non-binding to 3rd parties. In a civil law system, the judge’s role is to establish the facts of the case and to apply the provisions of the applicable code. Though the judge often brings the formal charge. Makes rulings; sets precedent; referee between lawyers.Judges decide matters of law and, where a jury is absent, they also find facts. Most judges rarely inquire extensively into matters before them, instead relying on arguments presented by the part
Countries Spain, China, Japan, Germany, most African nations, all South American nations (except Guyana), most of Europe United States, England, Australia, Canada, India
Constitution Always Not always
Precedent Only used to determine administrative of constitutional court matters Used to rule on future or present cases
Role of jury In cases of civil law, the opinion of the jury may not have to be unanimous. Laws vary by state and country. Juries are present almost exclusively in criminal cases; virtually never involved in civil actions. Judges ensure law prevails over passion. Juries are comprised only of laypersons — never judges. In the U.S., juries are employed in both civil and criminal cases. Their function is to weigh evidence presented to them, and to find the facts and apply the law.
History The civil law tradition developed in continental Europe at the same time and was applied in the colonies of European imperial powers such as Spain and Portugal. Common law systems have evolved primarily in England and its former colonies, including all but one US jurisdiction and all but one Canadian jurisdiction. For the most part, the English-speaking world operates under common law.
Sources of Law 1. Constitution 2. Legislation – statutes and subsidiary legislation 3. Custom 4. International Law 5. [Nota bene: It may be argued that judicial precedents and conventions also function within Continental systems, but they are not generally recogn 1. Constitution (not in the UK) 2. Legislation – Statutes and subsidiary legislation 3. Judicial precedent – common law and equity 4. Custom 5. Convention 6. International Law
Type of argument and role of lawyers Inquisitorial. Judges, not lawyers, ask questions and demand evidence. Lawyers present arguments based on the evidence the court finds. Adversarial. Lawyers ask questions of witnesses, demand production of evidence, and present cases based on the evidence they have gathered.
Evidence Taking Evidence demands are within the sovereign inquisitorial function of the court — not within the lawyers’ role. As such, “discovery” by foreign attorneys is dimly viewed, and can even lead to criminal sanctions where the court’s role is usurp Widely understood to be a necessary part of the litigants’ effective pursuit or defense of a claim. Litigants are given wide latitude in US jurisdictions, but more limited outside the US. In any event, the litigants and their lawyers undertake to a
Evolution Both systems have similar sources of law- both have statutes and both have case law, they approach regulation and resolve issues in different ways, from different perspectives Both systems have similar sources of law- both have statutes and both have case law, they approach regulation and resolve issues in different ways, from different perspectives


Historians believe that the Romans developed civil law around 600 C.E., when the emperor Justinian began compiling legal codes. Current civil law codes developed around that Justinian tradition of codifying laws as opposed to legal rulings.

Common law dates to early English monarchy when courts began collecting and publishing legal decisions. Later, those published decisions were used as the basis to decide similar cases.

Modern Common and Civil Law Systems

Today the difference between common and civil legal tenets lies in the actual source of law. Common-law systems make refer extensively to statutes, but judicial cases are considered the most important source of law, allowing judges to pro-actively contribute to rules. For example, the elements needed to prove the crime of murder are contained in case law rather than defined by statute. For consistency, courts abide by precedents set by higher courts examining the same issue.

In civil-law systems on the other hand, codes and statutes are designed to cover all eventualities and judges have a more limited role of applying the law to the case in hand. Past judgments are no more than loose guides. When it comes to court cases, judges in civil-law systems are more like investigators, while their equivalents in the common-law systems are rather arbiters between parties presenting arguments.

Below is a discussion on civil vs common law systems:

Countries following Civil or Common Law

The United States, Canada, England, India, and Australia are generally considered common law countries. Because they were all once subjects or colonies of Great Britain, they have often retained the tradition of common law. The state of Louisiana in the United States uses bijuridicial civil law because it was once a colony of France.

Civil law countries include all of South America (except Guyana), almost all of Europe (including Germany, France, and Spain), China, and Japan.

South Africa, Namibia, Botswana, and Zimbabwe are bijuridical, i.e., they follow a combination of both legal systems.

A map showing legal systems of the world. Click to enlarge.
A map showing legal systems of the world. Click to enlarge.

Legal representation

In both civil and common law countries, lawyers and judges play an important role.

However, in civil law countries, the judge is usually the main investigator, and the lawyer's role is to advise a client on legal proceedings, write legal pleadings, and help provide favorable evidence to the investigative judge.

In common law, the judge often acts as a referee, as two lawyers argue their side of the case. Generally, the judge, and sometimes a jury, listen to both sides to come to a conclusion about the case.


Though not a rule, common law countries may not always follow a constitution or a code of laws.

In civil law, the constitution is generally based on a code of laws, or codes applying to specific areas, like tax law, corporate law, or administrative law.


Freedom of contract is very extensive in common law countries, i.e., very little or no provisions are implied in contracts by law. Civil law countries on the other hand have a more sophisticated model for contract with provisions based in the law.


The decisions of judges are always binding in common law countries, althought that does not mean the decision may not be appealed. In the United States, for example, cases may be heard by a network of federal or state courts, with the federal Supreme Court holding ultimate power. Generally, the ruling of the last court that a case visits remains the final, binding verdict. That case may later be used as precedent to argue similar cases in the future.

In civil law countries, only the judicial decisions of administrative and constitutional courts are binding outside the original case. In essence, the concept of precedent, i.e. past cases can determine the outcome of future ones, is not used.

American vs. British Common Law

Because it began as a colony of England, the United States inherited many traditions of British common law, including habeas corpus and jury trials. After the American Revolutionary War, one of the first acts of the new government was to adopt existing English common law in full, unless it contradicted the U.S. Constitution.

However, in 1938, the U.S. Supreme Court ruled that there will be “no general common law.” So, from that year forward, federal courts deciding issues that originated in states had to look to the state judicial interpretations of those matters.

The 1938 decision was later amended so that the federal government could develop a common law based on uniquely federal interests, such as war, foreign policy, taxation, etc.


Common law is a peculiar to England in its origin. Until the Norman conquest, there were different rules for different regions of the country. But as the laws and the country began to unite, a common law was created based on customs and rulings across the country. These rules developed organically and were rarely written down.

European rulers on the other hand ruled on Roman law, and a compilation of rules issued by the emperor Justinian in the 6th century that was rediscovered in 11th-century Italy. With the Enlightenment of the 18th century, rulers from different continental countries took to comprehensive legal codes.


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