Legal positivism is a school of thought of philosophy of law and jurisprudence which holds that law is constructed from social facts, without regards to the merits of such law. It was developed largely by legal philosophers during the 18th and 19th centuries, such as Jeremy Bentham and John Austin. While Bentham and Austin developed legal positivist theory, empiricism provided the theoretical basis for such developments to occur. Some of the most prominent legal positivist writers of the 20th century have been Hans Kelsen, H. L. A. Hart, and Joseph Raz.
John Austin
Bust of Hans Kelsen in the Arkadenhof, University of Vienna
Jurisprudence is the philosophy and theory of law. It is concerned primarily with both what the law is and what it ought to be. That includes questions of how persons and social relations are understood in legal terms, and of the values in and of law. Work that is counted as jurisprudence is mostly philosophical, but it includes work that also belongs to other disciplines, such as sociology, history, politics and economics.
Philosophers of law ask "what is law, and what should it be?"
Aristotle, by Francesco Hayez
Thomas Aquinas was the most influential Western medieval legal scholar.
Bentham's utilitarian theories remained dominant in law until the twentieth century.
