Richard PosnerRichard Allen Posner (; born January 11, 1939) is an American jurist and economist who was a United States Circuit Judge of the United States Court of Appeals for the Seventh Circuit in Chicago from 1981 until 2017, and is a senior lecturer at the University of Chicago Law School. He is a leading figure in the field of law and economics, and was identified by ''The Journal of Legal Studies'' as the most cited legal scholar of the 20th century. He is widely considered to be one of the most influential legal scholars in the United States.
Posner is known for his scholarly range and for writing on topics outside of his primary field, law. In his various writings and books, he has addressed animal rights, feminism, drug prohibition, same-sex marriage, Keynesian economics, and academic moral philosophy, among other subjects.
Posner is the author of nearly 40 books on jurisprudence, economics, and several other topics, including ''Economic Analysis of Law'', ''The Economics of Justice'', ''The Problems of Jurisprudence'', ''Sex and Reason'', ''Law, Pragmatism and Democracy'', and ''The Crisis of Capitalist Democracy''. Posner has generally been identified as being politically conservative; however, in recent years he has distanced himself from the positions of the Republican party authoring more liberal rulings involving same-sex marriage and abortion. In ''A Failure of Capitalism'', he has written that the 2008 financial crisis has caused him to question the rational-choice, ''laissez-faire'' economic model that lies at the heart of his Law and Economics theory. Provided by Wikipedia