The Enlightenment: The Age of Reason, Scientific Revolution, and Intellectual Origins of Modern Political Institutions
The Enlightenment was not a uniform intellectual movement but a diverse knowledge wave across Britain, France, Germany, the Netherlands, and Scotland, sharing a core orientation: **reason and empirical evidence** (rather than traditional authority and religious revelation) as truth criteria; belief in human progress through education and institutional reform; criticism of religious intolerance and autocratic power.
## The Scientific Revolution: Epistemological Foundation of the Enlightenment
The **Scientific Revolution (16th–17th centuries)** provided the Enlightenment’s intellectual foundation: Copernicus (geocentrism → heliocentrism), Kepler (laws of planetary motion), Galileo (telescope observations, law of inertia), and Newton (universal gravitation and classical mechanics) collectively established a methodological paradigm for understanding nature through observation, experiment, and mathematical derivation — fundamentally challenging theological authority. Francis Bacon’s *Novum Organum* (1620) and Descartes’ methodological doubt (*Cogito ergo sum*, 1637) laid empiricist and rationalist epistemological paths.
## Political Enlightenment: From Natural Rights to Revolution
**John Locke’s (1632–1704)** political theory was the direct intellectual source of the American Revolution: government legitimacy derives from the governed’s consent (Social Contract); natural rights (life, liberty, and property) are inviolable; when government violates these rights, people have the right of revolution. Jefferson directly incorporated these theories into the Declaration of Independence (“life, liberty, and the pursuit of happiness” is Locke’s “life, liberty, and property” rewritten).
**French Enlightenment** (Voltaire, Montesquieu, Rousseau, Encyclopédistes) moved in a more radical direction: Rousseau’s “General Will” was later interpreted by Jacobins as majority will capable of overriding individual rights, providing (misused) theoretical justification for the French Revolution’s Reign of Terror.
