Answer:
The two ruling classes were totally putting aside the rights of the third classes. In that case, the so-called Estates were creating a disbalance in a country, where a small amount of the people held all the wealth and brought all the decisions. Members of the third estates were totally dissatisfied with this situation and asked for more rights.
Step-by-step explanation:
As the king and two estates were not happy with allowing them to gain more political rights they started organizing on their own. This eventually led to clash between third estate and the ruling classes that led to Revolution.