
Laws are a set of rules that are created and enforced by social or governmental institutions to regulate behaviour. Legal systems vary between jurisdictions, with differences analysed in comparative law. Laws are influenced by constitutions, and shape politics, economics, history and society. There are four main types of law: constitutional, statutory, administrative and case (common) law. Laws are made by legislatures, resulting in statutes, or by the executive through decrees and regulations. In the United States, law is derived from five sources: constitutional law, statutory law, treaties, administrative regulations, and common law. States have delegated lawmaking powers to various agencies, townships, counties, cities, and special districts, resulting in multiple layers of rules and regulations that citizens must navigate.
| Characteristics | Values |
|---|---|
| Definition | Rules created and enforced by social or governmental institutions to regulate behaviour |
| Influencing Factors | Constitutions, rights encoded in constitutions, politics, economics, history, and society |
| Creation | Legislatures, executives, or judges |
| Types | Constitutional, statutory, administrative, and case (common) law |
| Legal Reasoning Methods | Legal syllogism, analogy, argumentative theories |
| Interpretation Methods | Linguistic, teleological, systemic, golden rule, mischief rule |
| Enforcement | Military, police, courts |
| Examples | Gambling restrictions, bribery laws, copyright laws, civil rights protection, traffic rules, immigration laws |
| Reporting | Local police, Federal Bureau of Investigation (FBI), depending on the type of violation |
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What You'll Learn
- Laws are created and enforced by social or governmental institutions
- The Catholic Church has the oldest continuously functioning legal system in the western world
- Courts can annul laws and rules of the state when incompatible with higher norms
- Laws are designed to protect civil rights
- US law is derived from constitutional, statutory, administrative and case law

Laws are created and enforced by social or governmental institutions
Laws are a set of rules that are created and enforced by social or governmental institutions to regulate behaviour. The law shapes politics, economics, history and society and serves as a mediator of relations between people.
There are various types of laws, including constitutional, statutory, administrative and case (common) law. Constitutional law deals with the interpretation and application of the constitution, which outlines the fundamental principles and structure of a country's government and legal system. Statutory law refers to written laws created by a legislative body, such as Congress or Parliament, and enacted through a specific process. Administrative law relates to the regulations and decisions made by government agencies and officials in executing policies and managing public affairs. Case law, or common law, is derived from judicial decisions and precedents set by courts, which guide future rulings on similar cases.
In countries like the United States, the law is influenced by its federal and state governments, with each state having its own constitution and laws. The US legal system is primarily based on common law, which was inherited from English law. However, it has evolved to incorporate civil law innovations and diverge from its English predecessor. The US Constitution serves as the supreme law of the land, preempting conflicting state laws, although its scope is limited, and states possess plenary power. Federal laws are enacted by Congress, the lawmaking branch of the federal government, and can be found in the United States Code, organised by subject matter.
State governments also have significant lawmaking powers, with the ability to grant broader rights to their citizens than the federal Constitution, as long as they do not infringe upon federal constitutional rights. State laws can vary considerably, and residents of different states may be subject to different rules and regulations. States like Louisiana have unique legal systems, further adding to the complexity of the US legal landscape.
In addition to federal and state laws, local governments, townships, counties, and cities also have lawmaking powers, creating multiple layers of regulations that individuals must navigate in their daily lives.
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The Catholic Church has the oldest continuously functioning legal system in the western world
Law is a set of rules that are created and enforced by social or governmental institutions to regulate behaviour. The legal system varies between jurisdictions, and the creation of laws may be influenced by a constitution.
The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church in the world, with 1.27 to 1.41 billion baptised members worldwide. It is among the world's oldest and largest international institutions and has played a prominent role in the history and development of Western civilisation.
The history of Latin canon law can be divided into four periods: the jus antiquum, the jus novum, the jus novissimum, and the Code of Canon Law. The canon law of the Catholic Church is "how the Church organises and governs herself". It is a set of religious laws and ecclesiastical legal principles made and enforced by the Church's hierarchical authorities to regulate its external organisation and government and to direct the activities of Catholics toward the Church's mission.
Canon law as a sacred science is called canonistics, and its jurisprudence refers to the complex of legal principles and traditions within which canon law operates. The philosophy, theology, and fundamental theory of Catholic canon law are dedicated to providing a theoretical basis for canon law as a legal system and as true law.
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Courts can annul laws and rules of the state when incompatible with higher norms
Laws are a set of rules that are created and enforced by social or governmental institutions to regulate behaviour. They are influenced by a constitution, written or tacit, and the rights encoded therein. The law shapes politics, economics, history and society and also serves as a mediator of relations between people.
Courts with judicial review powers may annul the laws and rules of the state when they find them incompatible with a higher norm, such as primary legislation, the provisions of the constitution, treaties, or international law. This is an important check and balance in a democratic system, ensuring that the laws passed by a legislature are in line with the core values and principles of a nation, as outlined in its constitution.
In the United States, the federal courts were designed to be an "intermediate body between the people and their legislature", according to Alexander Hamilton in Federalist #78. This means that federal courts interpret the Constitution's meaning and the meaning of laws passed by Congress. If a law passed by Congress conflicts with the Constitution, the Constitution takes precedence, as it represents the intention of the people.
The Supremacy Clause in the US Constitution further underscores the authority of federal laws and the Constitution over conflicting state laws. It gives priority to federal laws and the Constitution, ensuring that even duly enacted state statutes do not override them if they are unconstitutional. This clause also applies to treaties, ensuring that state laws do not jeopardize the nation's treaty obligations.
In summary, courts play a crucial role in maintaining the rule of law and ensuring that the laws passed by state legislatures are compatible with higher norms, such as the constitution, federal laws, and international treaties. When state laws are found to be incompatible, courts can annul or strike them down, thus protecting the core values and principles of a nation.
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Laws are designed to protect civil rights
Laws are a set of rules that are created and enforced by social or governmental institutions to regulate behaviour. They are designed to protect the civil rights of citizens and ensure equal treatment and opportunity for all. For instance, in the United States, federal laws prohibit discrimination based on race, colour, religion, sex, and national origin in employment, as outlined in Title VII of the Civil Rights Act of 1964. This Act also aims to enforce the constitutional right to vote and protect civil rights in public facilities and education.
Federal disability rights laws also provide protection against discrimination, segregation, and exclusion for people with disabilities. Additionally, the FBI is authorised to investigate civil rights violations based on federal laws, such as the Crime Control Act of 1994. This Act makes it unlawful for governmental authorities or their agents to engage in practices that deprive individuals of their rights, privileges, or immunities guaranteed by the US Constitution or federal laws.
Furthermore, laws protect civil rights by ensuring equal access to reproductive health services and safeguarding religious freedom. Individuals also have the right to privacy and the ability to access and correct personal information held by the government under the Privacy Act. Laws also protect voting rights and safeguard against voter intimidation efforts.
In addition to federal laws, state laws play a crucial role in protecting civil rights. For example, state laws regulate gambling activities, requiring permits for special events in public spaces, and imposing restrictions on driving behaviours such as speeding, running red lights, and texting while driving. These laws help maintain order and ensure the safety and well-being of citizens.
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US law is derived from constitutional, statutory, administrative and case law
In the United States, the law is derived from constitutional, statutory, administrative, and case law. The US Constitution is the supreme law of the land, outlining the foundation of the federal government and various civil liberties. It sets the boundaries of federal law, which includes Acts of Congress, treaties, executive regulations, and case law from the federal judiciary.
Constitutional law forms the basis of the US legal system, with the Constitution serving as the supreme law. It establishes the framework for the federal government, outlines civil liberties, and sets the limits of federal power. The Constitution can influence law-making at both the federal and state levels, ensuring that laws are consistent with its principles.
Statutory law refers to the written laws created by legislative bodies. In the US, Congress is the primary law-making branch, enacting statutes that become federal law. These statutes must adhere to the boundaries set by the Constitution. State legislatures also create statutes specific to their respective states, addressing a range of issues.
Administrative law involves regulations established by government agencies to implement and enforce laws. Examples include rules set by the US Environmental Protection Agency or the Department of Social and Health Services. These regulations have the force of law and are essential for the functioning of various government departments.
Case law, or common law, refers to the decisions made by judges in court cases. These decisions create precedents that guide future cases with similar legal questions. Federal courts can create federal common law, but it must be linked to the interpretation of the Constitution, statutes, or regulations. State courts also play a crucial role in interpreting and applying case law within their jurisdictions.
The interplay between these four sources of law—constitutional, statutory, administrative, and case law—shapes the legal landscape in the United States, ensuring a comprehensive framework for governing the country.
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Frequently asked questions
The four main types of law are constitutional, statutory, administrative, and common law.
International law focuses on the legal implications of travel across borders for business, tourism, and permanent residence. There are two types: public international law, which works with governments and institutions, and private international law, which provides opportunities with corporations.
Civil law concerns wrongdoings by one private party against another. There are three types of civil law grievances: intentional, negligence, and strict liability. Examples include injury, slander, and trespass.











































