When contracts are invalidated for some reason (e.g. a car buyer is so drunk that he lacks legal capacity to contract) the contractual obligation to pay can be invalidated separately from the proprietary title of the car. Unjust enrichment law, rather than contract law, is then used to restore title to the rightful owner. The main institutions of law in industrialised countries are independent courts, representative parliaments, an accountable executive, the military and police, bureaucratic organisation, the legal profession and civil society itself. John Locke, in his Two Treatises of Government, and Baron de Montesquieu in The Spirit of the …

Anarchism has been practiced in society in much of the world. Mass anarchist communities, ranging from Syria to the United States, exist and vary from hundreds to millions. Anarchism encompasses a broad range of social political philosophies with different tendencies and implementation. King Hammurabi is revealed the code of laws by the Mesopotamian sun god Shamash, also revered as the god of justice. Hugo Grotius, the founder of a purely rationalistic system of natural law, argued that law arises from both a social impulse—as Aristotle had indicated—and reason. Immanuel Kant believed a moral imperative requires laws “be chosen as though …