Answer:
The Age of Reason and Enlightenment started off in the eighteenth century. This period has its root in France, thus giving it an alternate name of French Enlightenment. Even though this Age is said to have been started in the 1700s, the causes behind it started as long as two to three centuries before it. The dictatorship of the Church was the key reason behind the rebellion of the people.
Thats just an opinión though.