What Is Law?
Law is a system of rules created and enforced by a governing authority to regulate behavior, resolve disputes, and maintain order within a society. It applies to everyone within a given jurisdiction, and violations can carry consequences imposed by the state—fines, penalties, or imprisonment. Law differs from ethics and morality in one key way: it is backed by formal enforcement, while ethical and moral rules rely on personal conscience or social pressure. This explanation covers the definition, major types, common sources, and how legal systems vary.
Law vs. Ethics, Morality, and Custom
These four concepts overlap but are not the same:
| Concept | Source of authority | Enforcement | Example |
|---|---|---|---|
| Law | Government / state | Courts, police, penalties | Driving under the influence is a crime |
| Ethics | Professional or philosophical standards | Peer review, codes of conduct | A lawyer must avoid conflicts of interest |
| Morality | Personal or cultural values | Conscience, social disapproval | Lying to a friend is wrong |
| Custom | Long-standing social practice | Social expectation | Shaking hands when greeting someone |
An act can be legal but unethical, or illegal but considered morally justified by some people. Law sets a minimum standard of behavior that society will enforce; ethics and morality often demand more.
Major Types of Law
- Criminal law — governs conduct the state prohibits because it harms society (theft, assault, fraud). The state prosecutes the accused, and penalties can include imprisonment.
- Civil law — resolves disputes between private parties (contracts, property, personal injury). The remedy is usually compensation or an order to act, not punishment.
- Constitutional law — interprets the foundational document of a state, defining government powers and individual rights.
- Administrative law — governs how government agencies make and enforce regulations.
- International law — covers treaties, customs, and agreements between nations.
Note that "civil law" also names a legal tradition (see below), which is different from civil law as a category of dispute.
Common Sources of Law
Legal systems typically draw on several sources at once:
- Constitutions — the supreme law that establishes government structure and limits power.
- Statutes — laws passed by a legislature.
- Regulations — rules issued by executive agencies under statutory authority.
- Case law — decisions by courts that interpret statutes and constitutions, binding in later similar cases (the doctrine of precedent).
- Custom and tradition — unwritten practices recognized as legally binding in some systems.
How Legal Systems Vary
Two major traditions dominate globally:
- Common law systems (England, the United States, Canada, Australia) give significant weight to judicial precedent. Judges' past decisions shape future rulings.
- Civil law systems (most of continental Europe, Latin America, East Asia) rely primarily on comprehensive written codes. Judges apply the code rather than being bound by prior decisions.
Beyond tradition, law varies by jurisdiction—the geographic or political area where a particular set of laws applies. A city, state, and nation each have their own jurisdiction, and rules can differ sharply between them. Something legal in one country may be illegal in another.
Why the Distinction Matters
Understanding what law is—and what it is not—helps you:
- Recognize when a problem is legal rather than merely ethical
- Know which jurisdiction's rules apply to a situation
- Understand why courts sometimes reach different results in similar cases
For specific legal questions, consult a licensed attorney in the relevant jurisdiction, since this overview is general and cannot substitute for professional advice.