<human>:  Why did the French Revolution start in 1789?
<bot>: The French Revolution was a series of events that started in 1789 and lasted for 10 years. The revolution was caused by a lot of factors, but the main cause was the Enlightenment. The Enlightenment was a period of intellectual thought and exploration that started in the 17th century and continued through the 18th century. The Enlightenment thinkers believed that people should be free to think and express their thoughts. They also believed that people should be free to believe whatever they wanted. This is why the French Revolution started in 1789.