Raised from a young age to continue the philosophical tradition of Benthamite utilitarianism, John Stuart Mill contributed to philosophy of science and ethics.
John Locke was an Enlightenment philosopher who developed a social contract theory of natural rights and government.
Herbert Spencer was a 19th century philosopher, sociologist, and biologist and a prominent advocate for laissez-faire policies.
Agitator and pamphleteer par excellence, Thomas Paine was involved in both the American and French Revolutions.
Lord Acton was a 19th century politician, historian, and writer best remembered for his commentary on the corrupting influence of power.
Hugo Grotius, a 17th century Dutch legal scholar and philosopher, was the father of modern international law and a staunch opponent of war.
James Madison was the fourth President of the United States and was the chief architect of the United States Constitution.
Lysander Spooner was an American legal theorist, abolitionist, and anarchist.
Born a slave, Booker T. Washington went on to found Tuskegee University, and raised money for many other black schools and colleges.
Roger Williams founded the colony of Rhode Island and was an important advocate of freedom of religion.
Richard Cobden was the premiere advocate of free trade in 19th century Britain.
Erasmus, a great Renaissance scholar, was a champion of peace and religious toleration.
Albert Jay Nock, author, aesthete, and social critic, was an advocate of liberty in a collectivist age.