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by George H. Smith

Abolitionism was the 19th century anti-slavery movement promoting equal civil and political rights for African Americans and the rejection of slavery.



by Wendy McElroy

The debate over abortion & its implications for nations, citizens, public health & equality are outlined, showing division across all views.


Acton, Lord (1834-1902)

by Gregory Gronbacher

Lord Acton was a respected British historian and an advocate for limited government, religious freedom, and the Christian perspective of positive liberty.


Adams, John (1735-1826)

by Michiel Visser

John Adams, known as the 2nd US President, played a vital role in the American Revolution and contributed to the philosophy behind the US Constitution.


Affirmative Action

by Clint Bolick

Affirmative Action, programs meant to counteract racial discrimination, may also complicate equality despite striving to reach it.


American Revolution

by Robert M. S. McDonald

Robert McDonald outlines the key events of the American Revolution, one of the most influential successes of liberty to date.



by Bryan Caplan

The most minimal proposed form of state organization, anarchism, is the philosophy of the absence of government.



by Andrew Morriss

Anarcho-capitalism is a form of anarchism where market actors provide all goods and services to society, including security and common public goods.


Anti-Corn Law League

by Aaron Steelman

The Anti-Corn Law League was a group that opposed the protectionist British Corn Laws and have been praised for achieving radical libertarian reform.


by Donald J. Boudreaux

Antitrust legislation seeks to break up big companies and industry monopolies in order to keep markets competitive, but sometimes favors narrow interest groups.


Aquinas, Thomas (c. 1225-1274)

by George H. Smith

Thomas Aquinas was a philosopher who greatly influenced Catholic thought and promoted law not as a way to regulate morality, but to allow human choice.


Aristotle (382-322 BC)

by Fred Miller

Known as one of the most foundational ancient thinkers, Aristotle’s works explored morality and ethics along with government and social organization.


Arts and Public Support

by Louis Torres

Government support and funding for the arts has been contested for its too restrictive, too loose, or too political attempts to define art.


Assurance and Trust

by Daniel B. Klein

Assurance and trust are vital in any transaction. In this entry, Daniel Klein overviews the ways in which assurance arises and who should oversee it.