The Age of Enlightenment

What It Covers

The Age of Enlightenment traces how late 17th- to 18th-century thinkers — Locke, Voltaire, Rousseau, Montesquieu, and others — used reason and evidence to dismantle divine-right monarchy, reshape legal systems, and lay foundations for modern democracy and human rights.

Key Questions Answered

• •Separation of Powers: Montesquieu proposed dividing government into three distinct branches — legislative, executive, and judicial — each equipped with checks and balances to prevent any single body from accumulating absolute power, a framework directly embedded in the U.S. Constitution and most modern democracies.
• •Natural Rights as Government's Sole Purpose: John Locke argued in Two Treatises of Government that authority derives from the people, not divine mandate, and that government exists only to protect life, liberty, and property — a framework Thomas Jefferson mirrored almost directly in the Declaration of Independence.
• •Uniform Legal Codes: Cesare Beccaria argued in On Crimes and Punishment that laws must apply equally across all social classes, be written in common languages rather than Latin, and that punishments should be proportionate to crimes — eliminating torture and the death penalty entirely.
• •Education as Blank-Slate Development: Locke's tabula rasa concept held that humans are born without innate knowledge, making rational, curiosity-driven education — not rote Latin memorization — the foundation of social progress, a principle Diderot operationalized by compiling the first comprehensive Encyclopedia of human knowledge.