Here is a good summary of the enlightenment period lasting approximately from 1685 to 1815. Enlightenment was founded on Italian and Northern Renaissance Humanism, which in turn gave way to Romanticism, Liberalism, Classicism, and Modernism.
“If I have seen further than others, it is by standing upon the shoulders of giants.”
“It is dangerous to be right in matters on which the established authorities are wrong.”
“Dare to know! Have the courage to use your own reason!”
The above three quotes of legendaries, Isaac Newton, Voltaire, and Immanuel Kant, capture the spirit of the age: