The French Revolution (1789-1799) was deeply influenced by rationalism, a philosophical movement emphasizing reason and individualism over tradition and religious authority. Key figures like René Descartes and Voltaire advocated for rational thought, significantly impacting revolutionary ideas. Rationalism promoted critical thinking and skepticism of existing societal structures, including the monarchy and the Catholic Church. Revolutionary thinkers argued that reason should guide political decisions, leading to calls for egalitarianism and secular governance. This aligned with the Enlightenment, a broader intellectual movement that questioned traditional hierarchies and sought to apply scientific principles to society. The Declaration of the Rights of Man and of the Citizen, adopted in 1789, exemplified rationalist principles. It proclaimed that all men are born free and equal in rights, emphasizing individual liberty, equality before the law, and the separation of powers. These concepts were grounded in the idea that rational governance could lead to a just and equitable society. Rationalism also played a crucial role in the de-Christianization efforts during the revolution. The revolutionary government sought to reduce the influence of the Church, which was seen as an obstacle to reason and progress. This led to the Civil Constitution of the Clergy (1790), nationalizing Church property and requiring clergy to swear allegiance to the state. Many churches were repurposed or closed, and the cult of reason was promoted, celebrating human intellect and republican values. The rise of rationalism inspired scientific and educational advancements. The establishment of institutions like the National Institute of Sciences and Arts (1795) aimed to foster scientific research and scholarly exchange. Education reforms emphasized secular and rational curricula, intended to produce enlightened and civic-minded citizens. In conclusion, rationalism profoundly influenced the ideological foundations and policies of the French Revolution. It fostered a climate of intellectual inquiry and skepticism, challenging established authorities and advocating for a society governed by reason and equality.