Law is a system of rules, usually enforced through a set of institutions. It shapes politics, economics and society in numerous ways and serves as the foremost social mediator in relations between people. Writing in 350 BC, the Greek philosopher Aristotle declared, "The rule of law is better than the rule of any individual."
Law governs a wide variety of social activities. Contract law regulates everything from buying a bus ticket to trading on derivatives markets. Property law defines rights and obligations related to the transfer and title of personal and real property. Trust law applies to assets held for investment and financial security, while tort law allows claims for compensation if a person's rights or property are harmed. If the harm is criminalised in penal code, criminal law offers means by which the state can prosecute the perpetrator. Constitutional law provides a framework for the creation of law, the protection of human rights and the election of political representatives. Administrative law regulates the activities the administrative agencies of government, while International law governs affairs between sovereign nation states in activities ranging from trade, environmental regulation or military action.
