Ralph Waldo Emerson was an American philosopher who led the transcendentalist movement that developed in the eastern United States in the 1820s and 1830s. He is credited with popularizing individualism through his numerous lectures and essays. Emerson influenced many thinkers and writers that followed him; he mentored Henry David Thoreau, who went on to become a leading transcendentalist.
Regarded by many as the father of modern linguistics, Noam Chomsky has authored over 100 books on varied topics, such as politics, linguistics, and war. A multi-talented personality, Noam Chomsky is considered a popular figure in analytic philosophy. Apart from influencing a wide array of academic fields, he has also contributed to the development of cognitivism.
William James was an American psychologist and philosopher. Widely regarded as the father of American psychology and one of the most influential American philosophers, James was the first educator in the United States to offer a course in psychology. He is also credited with co-founding a psychological school of thought called functional psychology and establishing a philosophical school called pragmatism.
A staunch advocate of progressive education and liberalism, the American philosopher and psychologist was the founder of the University of Chicago Laboratory Schools. John Dewey’s famous writings included The Reflex Arc Concept in Psychology and Human Nature and Conduct. According to him, passion for knowledge and intellectual curiosity were central to a teacher. He called himself a democratic socialist.
Henry David Thoreau was an American philosopher, essayist, poet, and naturalist. He is credited with popularizing transcendentalism and simple living. His philosophy of civil disobedience, which was detailed in his essay of the same name, later influenced world-renowned personalities like Leo Tolstoy, Martin Luther King Jr., and Mahatma Gandhi.
Ayn Rand was a Russian-American philosopher and writer. Apart from publishing two best-selling novels, Ayn Rand is credited with developing a philosophical system called Objectivism. Over the years, Ayn Rand has been a major influence among American conservatives and libertarians. Some of the famous personalities influenced by her include Amber Heard, Vince Vaughn, Jimmy Wales, Ayelet Shaked, and Mary Ruwart.
Hailed as one of the greatest logicians since Aristotle, Kurt Gödel was Austrian-born American mathematician, logician, and philosopher, who earned international stardom for his incompleteness theorem. Also credited with developing a technique called Gödel numbering, he later started working on Mathematical Platonism, a philosophical theory that failed to attract wide acceptance.
The Schock Prize and National Humanities Medal-winning American moral and political philosopher John Bordley Rawls is often counted among the most influential political philosophers of the twentieth-century. Notable books of Rawls, where he elucidated his theory of justice and which has influenced a variety of thinkers, includes A Theory of Justice and Political Liberalism.
Cornel West is an American philosopher, social critic, political activist, and author. He is renowned for drawing intellectual contributions from several traditions, such as Marxism, Christianity, transcendentalism, and neopragmatism. West is credited with authoring many influential books, such as Democracy Matters and Race Matters.
American philosopher of science Thomas Kuhn is noted for his book on history of science, The Structure of Scientific Revolutions, publication of which marked a significant event in the history, philosophy, and sociology of science. He presented his notion of paradigm shift and identified and elaborated on normal science in this book which remained influential in academic and popular circles.
Economist and University of California, Berkeley professor Robert Reich has also been the U.S. secretary of labor. His rare bone disorder made him a victim of bullies in childhood, but he later won the Rhodes Scholarship to Oxford. His bestselling book Saving Capitalism was made into a Netflix documentary.
Born into a Jewish working-class, immigrant family in Brooklyn, Howard Zinn was initially dragged into communism. He was part of the U.S. Army during World War II and later established himself as a historian. Of his many books, the most popular has been A People's History of the United States.
As a child, Ethan Allen was fond of deciphering passages from the Bible. He grew up to co-establish Vermont and led the Green Mountain Boys during the American Revolutionary War. After failing to achieve Vermont’s separation from New York, he tried to unite Vermont with Canada.
American philosopher and social psychologist George Herbert Mead was one of the pioneers of pragmatism and symbolic interactionism. He taught at the University of Chicago, and his ideas later came to be known as the Chicago school of sociology. His notable lectures were published as books only after his death.
English-born American political activist, philosopher, and revolutionary, Thomas Paine, is credited to have penned some of the most influential pamphlets at the start of the American Revolution. His works inspired the common people of America and motivated them to fight for independence from British rule. He was ostracized for criticizing Christianity and died a lonely man.
The proponent of the Frankfurt School of critical theory, Herbert Marcuse largely influenced the leftist student revolts of the 1960s. Equipped with a PhD in German literature, he wrote Hegel’s Ontology and the Theory of Historicity, with Martin Heidegger. His Eros and Civilization spoke at length about capitalism.
Charles Sanders Peirce was an American philosopher, mathematician, logician, and scientist. He is best remembered for his immense contributions to logic. Philosopher Paul Weiss called him America's greatest logician. Charles Sanders Peirce is also regarded by some as the father of pragmatism.
Will Durant was an American writer, philosopher, and historian. He is credited with writing The Story of Philosophy which helped popularize philosophy in the USA. Will is also remembered for co-writing an 11-volume set of books titled The Story of Civilization along with his wife Ariel. Will and Ariel were awarded the Pulitzer Prize and the Presidential Medal of Freedom.
Alfred North Whitehead was a British mathematician and philosopher, best known for his collaboration with his student Bertrand Russell on Principal of Mathematics, a three-volume work on the foundations of mathematics. Also known for his pioneering works on process philosophy and metaphysics, he is credited with developing a comprehensive metaphysical system that differs from most Western philosophies.
One of the "Four Horsemen of Atheism," neuroscientist and author Sam Harris is known for his works on topics such as religion, artificial intelligence, and terrorism. His books include the New York Times bestseller The End of Faith. He hosted the podcast Making Sense and released a meditation app, too.
Born in India, Ravi Zacharias was attracted to Christianity while recovering in hospital following a suicide attempt. He moved to Canada and then to the U.S., and gained fame as a Christian apologist and as the host of Let My People Think. He was later accused of sexual abuse.
Murray Bookchin, also known by his pseudonyms M.S. Shiloh and Lewis Herber, was an anarchist, a political philosopher, and an academic, best known for his fight against capitalism. The son of Russian immigrants, he followed communism since age 9. He had also penned books such as The Ecology of Freedom.
Scottish-American philosopher Alasdair MacIntyre is noted for his contributions to moral and political philosophy. His major writings include Whose Justice? Which Rationality? and After Virtue. The latter is considered to be a significant work of Anglophone moral and political philosophy and an important text in the contemporary revival of virtue theory.
Theoretical physicist Sean M. Carroll is a renowned Caltech professor who considers himself an old-school theorist and often maps his research using pencil and paper. Interested in field theory, gravitation, and cosmology, he blogs often, had written popular books, and has also appeared on shows such as The Universe.
Social philosopher and author Eric Hoffer was rendered half-blind at 7 due to an accident but regained his sight at 15. Orphaned in his 20s, he took up odd jobs, and once even contemplated suicide. His first book, The True Believer, catapulted him to fame, and he never looked back.
Francis Schaeffer was an American philosopher, evangelical theologian, and Presbyterian pastor. He is credited with co-founding the L'Abri community, an evangelical Christian organization, along with his wife Edith Schaeffer. Francis Schaeffer's work has influenced several Christian conservative leaders like Tim LaHaye as well as members of the L'Abri community.
L. Ron Hubbard was an American author of fantasy and science fiction stories. In 1950, he wrote Dianetics: The Modern Science of Mental Health and worked towards promoting Dianetics by conducting seminars and establishing a series of organizations. Credited with founding the Church of Scientology, L. Ron Hubbard oversaw the development of the church into a worldwide organization.
Gregory Bateson was an English anthropologist, social scientist, linguist, and visual anthropologist. Along with his colleagues, he developed the double-bind theory of schizophrenia. Also a cyberneticist, he was part of the core group of the Macy Conferences in Cybernetics. He was a member of philosopher William Irwin Thompson's esoteric nonprofit foundation Lindisfarne Association.
R. C. Sproul was a Reformed theologian. He was an ordained pastor in the Presbyterian Church in America and also the founder and chairman of Ligonier Ministries. He has been described as the greatest proponent of the recovery of Reformed theology in the 20th century. He was a popular speaker and a co-pastor at Saint Andrew's Chapel as well.