The notable figure of the French Revolution known for his radical social ideals and leadership was Maximilien Robespierre. As a leading member of the Committee of Public Safety, he championed the ideals of liberty and equality, advocating for widespread reforms. His influence peaked during the Reign of Terror, when he implemented drastic measures against perceived enemies of the Revolution. Despite his initial popularity, Robespierre's extreme tactics led to his downfall in 1794, illustrating the complexities and dangers of revolutionary zeal and authoritarianism during this pivotal period in history.