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