The French Revolution: Social Causes

The Fench Revolution was caused by unrest within the third the Estate of the nation's people's social laddder. The three class system imposed a tax on the 98 percentile of France. The third house consists of peasants, lower nobles, and the latter. The second Estate and upwards are nobles, monarchas, mechants, kings, and Queens.
The anger of the lower class was incited, due to the taxation laws. The first and Second Estates who were more wealthy paid the least taxes whilst the majority of debt was left to the Third Estate who owned and consumed far less. People began to protest and soon the fight became more outright violent than purely political.
Enlightenment thinkers such as John Locke very much influenced the Revolution. It provided such things as a basis for personal freedoms we are to be born with and certain inaliable rights. These being freedoms and the pursuit of happiness. Mr. Locke believed these things were given to coexist in modern civil society.

Due to men like King Louis XVI;

"Feudalism and Unfair Taxation

No one factor was directly responsible for the French Revolution. Years of feudal oppression and fiscal mismanagement contributed to a French society that was ripe for revolt. Noting a downward economic spiral in the late 1700s, King Louis XVI brought in a number of financial advisors to review the weakened French treasury. Each advisor reached the same conclusion—that France needed a radical change in the way it taxed the public—and each advisor was, in turn, kicked out."- http://www.sparknotes.com/history/european/frenchrev/summary.html

Reasons for Revolution were abundant and abound.

On July 14, 1789 The delegates of the 3rd Estate stormed King Loiu's Bastille and took his life establishing the day as equivalent to America's 4th of July.