Law is a system of rules that are created and enforced through social or governmental institutions to regulate behavior. These systems include statutes (laws made by a legislature), regulations and decrees (made by a government executive), or established by judges through precedent in common law jurisdictions.
Legal systems vary greatly from nation to nation, and often from region to region within a country. Generally, they consist of a combination of state-enforced laws and private-sector contracts, including arbitration agreements.
The main function of law is to provide a framework and rules for settling disputes between individuals. It provides a system for people to bring their dispute to an impartial tactic, such as a judge or jury, and also offers legal options where people can work together to find a solution.
In modern society, there are several theories about the purpose and function of law. Some theorists believe that law is a means to an end; others view it as a tool for securing justice in a society.
Dean Roscoe Pound defines law as a social institution that serves its purpose of satisfying social wants. He also treats law as a species of social engineering, an instrument that balances competing interests and conflicting desires.
Many theorists see law as an extension of human nature. Its form, structure and procedures differ from society to society, but most agree that law is a tool for securing justice in society. This is why it should constantly evolve to fit the needs of a changing society.