Liberalism, the belief in freedom, equality, democracy and human rights, is historically associated with thinkers such as John Locke and Montesquieu, and with constitutionally limiting the power of the monarch, affirming parliamentary supremacy, passing the Bill of Rights and establishing the principle of "consent of the governed". The 1776 Declaration of Independence of the United States founded the nascent republic on liberal principles without the encumbrance of hereditary aristocracy—the declaration stated that "all men are created equal and endowed by their creator with certain unalienable rights, among these life, liberty, and the pursuit of happiness". A few years later, the French Revolution overthrew the hereditary aristocracy, with the slogan "liberty, equality, fraternity" and was the first state in history to grant universal male suffrage. The Declaration of the Rights of Man and of the Citizen, first codified in 1789 in France, is a foundational document of both liberalism and human rights, itself based on the U.S. Declaration of Independence written in 1776. The intellectual progress of the Enlightenment, which questioned old traditions about societies and governments, eventually coalesced into powerful revolutionary movements that toppled what the French called the Ancien Régime, the belief in absolute monarchy and established religion, especially in Europe, Latin America and North America.
William Henry of Orange in the Glorious Revolution, Thomas Jefferson in the American Revolution and Lafayette in the French Revolution used liberal philosophy to justify the armed overthrow of what they saw as tyrannical rule. The 19th century saw liberal governments established in nations across Europe, South America and North America. In this period, the dominant ideological opponent of classical liberalism was conservatism, but liberalism later survived major ideological challenges from new opponents, such as fascism and communism. Liberal government often adopted the economic beliefs espoused by Adam Smith, John Stuart Mill and others, which broadly emphasized the importance of free markets and laissez-faire governance, with a minimum of interference in trade.
