The correct answer to this open question is the following.
The Three States were formed by these social classes in France: the peasants, very poor people that lived by the day; the workers and the Bourgeoise, that represented the middle class in France. They were heavy taxed by the monarchy and the people could not afford enough money yo pay taxes and make a living. They lived a desperate situation.
The Enlightenment ideas influence people with never before considered issues such as liberty, freedom of speech, and equality. People started to question the legitimacy of the king and the expensive monarchy. The problems hit bottom with the economic crisis. People worked but they did not have enough to make a living, barely surviving. Business went bankruptcy, people had no more, many of them were dying, diseases spread, they had no options but to fight.