What was the Enlightenment and where did it come from?
The Enlightenment (roughly 1680–1800) was a time when many writers in Europe said: think for yourself, use reason (careful thinking) and evidence. The philosopher Immanuel Kant summed it up as "Dare to know".
It grew from the Scientific Revolution. Copernicus, Galileo and Newton showed that the planets and falling objects follow simple laws. If nature has laws that reason can find, people asked, could society also be improved by reason?
Faith and reason
Most Enlightenment thinkers were not against religion. Many were deists (they believed in a creator who does not interfere). They attacked intolerance and the power of church leaders over science and law, and asked for freedom of belief.
Key thinkers and their big ideas
| Thinker | Big idea |
|---|---|
| John Locke (England) | Natural rights: life, liberty, property. Government must protect them, or people may change it. |
| Montesquieu (France) | Separation of powers: legislative, executive and judicial branches check each other. |
| Voltaire (France) | Freedom of speech and religious tolerance; he mocked unfair trials. |
| Rousseau (Geneva) | Social contract: the people are sovereign; laws should express the general will. |
| Beccaria (Italy) | Fair justice: no torture, punishments that fit the crime. |
| Adam Smith (Scotland) | Free trade and the division of labour. |
| Mary Wollstonecraft (England) | Girls and women deserve the same education and rights. |
These ideas did not reach everyone equally: many thinkers still ignored women, enslaved people and colonised peoples. Critics later pointed out this gap.
How ideas spread: books, salons and the Encyclopédie
More people could read, and printing was cheaper. Ideas travelled through newspapers, pamphlets and novels, coffee houses, reading clubs, scientific academies and salons (meetings in private homes, often hosted by women). Diderot and d'Alembert's Encyclopédie (from 1751) gathered knowledge on science, crafts and ideas in many volumes.
Writers used clear prose, satire and letters to reach ordinary readers. Across Europe, including Central and Eastern Europe, schools were reformed and national languages and cultures were studied with new pride.
Effects: enlightened rulers and revolutions
Enlightened absolutism: some all-powerful monarchs, such as Frederick II of Prussia, Catherine II of Russia and Joseph II of Austria, used some ideas: religious tolerance, better schools, fewer cruel punishments. But they kept full power for themselves.
Revolutions: the American Declaration of Independence (1776) used Locke's language of rights. The French Revolution (1789) announced the Declaration of the Rights of Man. Later, anti-slavery campaigns, new constitutions and freedom movements around the world, and reformers such as Raja Ram Mohan Roy in India, used ideas of reason and rights.
Cause and effect chain
Scientific Revolution → trust in reason → new ideas on rights and government → spread by print and salons → reforms and revolutions.
Key formulas and definitions
- Reason: careful thinking based on evidence
- Natural rights: rights every person has from birth (life, liberty, property)
- Separation of powers: legislative + executive + judicial
- Social contract: people agree to form a government that serves them
- Enlightened absolutism: a monarch with full power who makes some reforms
Worked examples
1. Which Enlightenment idea stops one person from making, carrying out and judging all laws?
Separation of powers (Montesquieu). Power is split between the legislature, the executive and the judiciary, which check each other.
2. Put in order: French Revolution, Newton's laws, Encyclopédie begins, American Declaration of Independence.
Newton's laws (1687) → Encyclopédie begins (1751) → American Declaration (1776) → French Revolution (1789).
3. Why is Catherine II called an 'enlightened absolutist' and not a democrat?
She read Enlightenment writers and made some reforms in law and education, but she kept all power and did not let the people choose the government.
Common mistakes
- Thinking the Enlightenment was one event on one date. It was a long movement of ideas over about a century.
- Saying all Enlightenment thinkers were against religion. Most wanted tolerance, not an end to faith.
- Mixing up Locke (natural rights) and Montesquieu (separation of powers).
- Believing enlightened rulers gave power to the people. They reformed but kept absolute power.