Answer:
Because of the political and social system that had been established in France centuries ago.
Step-by-step explanation:
After the fall of the Roman Empire, France became a feudal kingdom, and as the world implies, the Kingdom imposed a feudal social structure with three classes: the nobles, the priests, and the common people (mostly farmers).
As the Middle Ages and the Modern Era progressed, this system consolitated, with one important change: the monarch concentrated more and more political power, become not only more powerful, but also wealthier.
Social division escalated, with inequality being greater than ever in the years prior to the French Revolution. This social and political structure served as the main enemy of the Revolution, and was partially dismantled during the events that would ensue.