"The State is that organization in society which attempts to maintain a monopoly of the use of force and violence in a given territorial area; in particular, it is the only organization in society that obtains its revenue not by voluntary contribution or payment for services rendered but by coercion. While other individuals or institutions obtain their income by production of goods and services and by the peaceful and voluntary sale of these goods and services to others, the State obtains its revenue by the use of compulsion; that is, by the use and the threat of the jailhouse and the bayonet."

The Anatomy of the State,
Murray Rothbard