Was an intellectual movement that was born in the 17th century.

Religious tolerance, as most Enlightenment thinkers were deists. They believed in God, but through reason and the observation of nature. They supported freedom of thought.
They also had a strong confidence in progress. They believed that reason could transform society.

Social changes: Enlightenment writers were against Feudal Society, Men had unalienable rights. No one should inherit prestige or privileges or be untitled to them because of their ancestors.the most important thing: The idea of progress was very important to them.

New economic ideas: They opposed mercantilism, the economic system that was favoured by absolutism. They also defined economic liberalism, which was formulated by Adam Smith in his book The Wealth of Nations. The importance of private property,

New political ideas:
They opposed absolutism. It was considered arbitrary and subject to error. They also thought that despotism was also against the happiness of a majority. Rousseau wrote The Social Contract, a book that establishes that legitimate authority is based on a contract between the rulers and the ruled people, called Constitution. He also defined the concept of popular sovereignty. Power comes from the consent of all citizens expressed through voting.