France · 1789

What Caused the French Revolution?

By William Souef · Published August 19, 2026

A state too broke to govern

France in the 1780s was Europe's most populous major power, and its treasury was running on borrowed money. A century of wars — most recently the American Revolutionary War, in which France bankrolled and armed the colonists to weaken Britain — had been financed by loans rather than taxes. By 1788 the interest alone consumed around half the crown's revenue, and lenders were losing confidence. The obvious fix, taxing the land wealth of the nobility and the Church, was proposed repeatedly by the king's own finance ministers — Turgot, Necker, Calonne — and defeated every time by the privileged bodies that would have paid.

This was the trap that made revolution possible: the monarchy was absolute in theory but could not raise a new tax in practice. When the Assembly of Notables (1787) and the regional parlements refused reform, Louis XVI was left with one constitutional device no king had used in 175 years: summoning the Estates-General, a body representing clergy, nobility, and everyone else — the Third Estate.

Bread at the edge of famine

Politics alone might have produced a constitutional crisis rather than a revolution. What put crowds in the streets was hunger. The harvest of 1788 failed — a summer hailstorm flattened grain across the Paris basin, and the winter that followed froze rivers and mills. Grain prices climbed through the spring of 1789 and peaked, in Paris, in the very week the Bastille fell. For wage earners who normally spent a third to a half of their income on bread, the crisis was existential; contemporary estimates put the figure far higher that summer.

Hunger did not cause the Revolution by itself — France had survived worse famines without one. But it fused economic desperation to a political crisis that was already underway, and it made Paris, a city of 600,000 with grain wagons it could see being escorted by troops, combustible.

Ideas that made it thinkable

For decades, Enlightenment writers had been dismantling the intellectual foundations of absolute monarchy — Montesquieu on the separation of powers, Rousseau on popular sovereignty, Voltaire on the Church. Censorship failed to contain any of it. By 1789 this was no longer abstract philosophy: in January, the abbé Sieyès published What Is the Third Estate?, answering — "Everything. What has it been until now in the political order? Nothing. What does it ask? To become something." The pamphlet sold tens of thousands of copies in weeks.

When the Estates-General deadlocked over whether to vote by order (guaranteeing the privileged a veto) or by head, Sieyès's logic won: on 17 June 1789 the Third Estate deputies declared themselves the National Assembly — the representatives not of an estate but of the nation. Three days later, locked out of their hall, they swore the Tennis Court Oath not to separate until France had a constitution.

The spark: July 1789

The king appeared to concede, then moved troops toward Paris and dismissed Necker, the one minister the public trusted. Paris read it as the prelude to a crackdown. On 14 July, crowds seeking weapons took muskets from the Invalides and marched on the Bastille for its gunpowder. After hours of fighting and about a hundred deaths, the fortress surrendered; its governor was killed by the crowd. Militarily trivial, the event settled the real question — the king could no longer enforce his will in his own capital — and within weeks, peasant risings across France (the Great Fear) dismantled the feudal order from below. On 4 August the Assembly abolished feudal privileges; on 26 August it passed the Declaration of the Rights of Man.

The Revolution's later turns — the failed flight of the king, war with Europe, the Republic, the Terror — were not inevitable in 1789. But the four causes were already visible in that single summer: a bankrupt state, a hungry capital, a blocked reform, and a public that had learned to say nation where it used to say king.

Frequently asked questions

Was the French Revolution just about bread prices?

No. The bread crisis of 1788–89 explains the timing and the crowds, but the structural causes were fiscal and political: a bankrupt state that could not tax its wealthiest orders, and an educated public that no longer accepted absolute monarchy as legitimate. Hunger fused with those causes; it did not replace them.

Why was the Bastille stormed on 14 July 1789?

The immediate objective was practical: the fortress held gunpowder that Parisians needed for the muskets they had seized that morning, fearing a royal military crackdown after the king dismissed the popular minister Necker. Its fall mattered symbolically — the crown had lost control of Paris. The prison itself held only seven inmates.

Did the Revolution immediately overthrow the king?

No. Louis XVI remained king — first absolute, then constitutional — for three more years. The monarchy was abolished in September 1792, after the royal family's failed escape and France's descent into war with Austria and Prussia, and Louis was executed in January 1793.