Reason, print, and academies rewired Europe's mind in the 1700s
The Enlightenment blossomed from late seventeenth-century Europe, peaking in the eighteenth as ideas crossed the Atlantic and Oceania. Built on the Scientific Revolution, it prized empirical inquiry, individual liberty, religious tolerance, and constitutional government while salons, coffeehouses, and encyclopedias spread dissent.
Also called the Age of Reason, the movement emphasized progress, natural rights, and applying rational principles to church and state. Galileo, Kepler, Bacon, Newton, and others supplied new empirical methods; Descartes's 1637 Discourse and Newton's 1687 Principia mark common starting points, while traditional dates run from Louis XIV's 1715 death to the 1789 French Revolution or Kant's 1804 death. Institutions—scientific academies, salons, coffeehouses, Masonic lodges, and print culture—circulated ideas that undermined monarchy and clergy, foreshadowing later liberalism and socialism.
Central doctrines included representative government, rule of law, and religious freedom versus absolute monarchy and persecution; radical currents pushed deism, atheism, secular states, and suppression of religious orders, opposed by Isaiah Berlin's Counter-Enlightenment defending tradition. Influential thinkers ranged from Locke, Spinoza, and Leibniz to Voltaire, Rousseau, Montesquieu, Hume, Smith, Kant, and Beccaria. Diderot and d'Alembert's Encyclopédie (1751–1772, 35 volumes, 150 contributors) became a flagship text alongside Locke's toleration treatises, Montesquieu's Spirit of the Laws, Rousseau's Social Contract, Smith's Wealth of Nations, Kant's Critique of Pure Reason, and Wollstonecraft's 1792 Rights of Woman.
Jonathan Israel distinguished moderate Enlightenment figures seeking reform within faith and power from a Radical Enlightenment inspired by Spinoza demanding democracy and free expression. Paris mid-century became a hub where Madame de Pompadour's patronage and Pierre Bayle's skeptical Dictionary fed philosophes who argued for natural law and experimental science; Montesquieu's separation of powers influenced the United States Constitution. Scottish moralist Francis Hutcheson's greatest-happiness principle shaped Hume and Smith; Kant tried reconciling freedom with authority through public and private reason.
Science was embedded in natural philosophy—physics, chemistry, anatomy, geology—valuing empiricism yet criticized by Rousseau for distancing humans from nature. Lavoisier's experiments fed modern chemical plants; Montgolfier balloons carried the first manned flight in 1783. Academies replaced universities as creators of knowledge: by 1789 over seventy official scientific societies existed, prompting Fontenelle's label Age of Academies. Enlightenment science promised advancement while remaining contested—a rational project still entangled with faith, gender, empire, and the revolutions it helped legitimize.
Source: Age of Enlightenment
