The influence of the philosophes on the French Revolution can be seen through their contributions to revolutionary ideas and the intellectual climate of pre-revolutionary France. The Enlightenment, a cultural and intellectual movement of the 18th century, provided the backdrop for the revolution. The philosophes, prominent thinkers of this period, emphasized reason, individualism, and skepticism of traditional authorities. Voltaire was one of the most influential philosophes. His writings criticized the Catholic Church and the French monarchy, advocating for religious tolerance and freedom of speech. Through sharp wit and engaging prose, Voltaire challenged the status quo and inspired many revolutionaries. Jean-Jacques Rousseau brought forward another significant strand of thought. His work "The Social Contract" promoted the idea of popular sovereignty (a concept where the population collectively constitutes the ultimate authority). Rousseau argued that society should be governed by the general will, an idea that resonated with those advocating for democratic reforms during the revolution. Montesquieu's "The Spirit of the Laws" introduced the idea of the separation of powers within government, contrasting the absolutist model that dominated France. By dividing government into the executive, legislative, and judicial branches, Montesquieu believed that liberty could be preserved. This notion later influenced the French Revolutionary constitution and the structure of modern democracies. Denis Diderot, another prominent philosophe, co-created "Encyclopédie", a massive compilation of knowledge that disseminated Enlightenment ideas. His emphasis on rationality and empirical evidence encouraged critical thinking and skepticism about tradition and authority, fueling revolutionary sentiments. The cumulative effect of these philosophes was to erode the ideological foundations of the Ancien Régime. By challenging the divine right of kings and promoting ideas of equality, justice, and human rights, they laid the intellectual groundwork for the French Revolution. Their writings served as both inspiration and justification for radical change, culminating in the events that reshaped France in the late 18th century. Although not participants in the revolution themselves, the philosophes' ideas permeated the consciousness of those who sought to transform French society.