Jean-Jacques Rousseau

Social Contract: A theory or model originating during the Age of Enlightenment that typically addresses the questions of the origin of society and legitimacy of authority over individuals. This is one key concept proposed by Rousseau.

Romanticism: An artistic, literary, musical, and intellectual movement characterized by its emphasis on emotion and individualism. Some ideas from this movement align with Rousseau's beliefs about human nature.

General Will: The will of people as a whole. It's like a group decision where everyone agrees for common good. This is another important concept introduced by Rousseau.