John Austin was a 19th century English jurist who is considered the founder of analytical jurisprudence. He entered the army after finishing school and later became a lawyer. In 1826, he was appointed to a chair of jurisprudence at the University of London. His most influential work was "The Province of Jurisprudence Determined" published in 1832, where he analyzed the nature of positive law and sovereignty. Austin defined positive law as a command from a sovereign backed by sanctions for disobedience. He believed law derives from a sovereign who is habitually obeyed but not themselves in the habit of obedience to any other.