
Norman Patrick Barry was an English political philosopher best known as an exponent of classical liberalism. For much of his career he was a professor of social and political theory at the University of Buckingham.

Nathaniel Branden was a Canadian–American psychotherapist and writer known for his work in the psychology of self-esteem. A former associate and romantic partner of Ayn Rand, Branden also played a prominent role in the 1960s in promoting Rand's philosophy, Objectivism. Rand and Branden split acrimoniously in 1968, after which Branden focused on developing his own psychological theories and modes of therapy.

William Frank Buckley Jr. was an American public intellectual and conservative author and commentator. In 1955, Buckley founded National Review, a magazine that stimulated the conservative movement in the late-20th century United States. Buckley hosted 1,429 episodes of the public affairs television show Firing Line (1966–1999), the longest-running public affairs show in American television history with a single host, where he became known for his distinctive Mid-Atlantic idiolect and wide vocabulary.

Whittaker Chambers was an American writer-editor, who, after early years as a Communist Party member (1925) and Soviet spy (1932–1938), defected from the Soviet underground (1938), worked for Time magazine (1939–1948), and then testified about the Ware group in what became the Hiss case for perjury (1949–1950), often referred to as the trial of the century, all described in his 1952 memoir Witness. Afterwards, he worked as a senior editor at National Review (1957–1959). US President Ronald Reagan awarded him the Presidential Medal of Freedom posthumously in 1984.

Thomas Carl Hartmann is an American radio personality, author, former psychotherapist, businessman, and progressive political commentator. Hartmann has been hosting a nationally syndicated radio show, The Thom Hartmann Program, since 2003 and hosted a nightly television show, The Big Picture, between 2010 and September 2017.

Christopher Eric Hitchens was an English intellectual, polemicist, and socio-political critic who expressed himself as an author, orator, essayist, journalist, and columnist. Hitchens was the author, co-author, editor, or co-editor of over 30 books, including five collections of essays on culture, politics, and literature. He became an American citizen in 2007.

Robert Nozick was an American philosopher. He held the Joseph Pellegrino University Professorship at Harvard University, and was president of the American Philosophical Association. He is best known for his books Philosophical Explanations (1981), which included his counterfactual theory of knowledge, and Anarchy, State, and Utopia (1974), a libertarian answer to John Rawls' A Theory of Justice (1971), in which Nozick also presented his own theory of utopia as one in which people can freely choose the rules of the society they enter into. His other work involved ethics, decision theory, philosophy of mind, metaphysics and epistemology. His final work before his death, Invariances (2001), introduced his theory of evolutionary cosmology, by which he argues invariances, and hence objectivity itself, emerged through evolution across possible worlds.

Murray Newton Rothbard was an American heterodox economist of the Austrian School, economic historian and political theorist. Rothbard was the founder and leading theoretician of anarcho-capitalism, a staunch advocate of historical revisionism and a central figure in the 20th-century American libertarian movement. He wrote over twenty books on political theory, revisionist history, economics, and other subjects.

George Saunders is an American writer of short stories, essays, novellas, children's books, and novels. His writing has appeared in The New Yorker, Harper's, McSweeney's, and GQ. He also contributed a weekly column, American Psyche, to the weekend magazine of The Guardian between 2006 and 2008.

Robert Anton Wilson was an American author, futurist and self-described agnostic mystic. Recognized by Discordianism as a Pope and saint, Wilson helped publicize the group through his writings and interviews.