Charles-Irénée Castel de Saint-Pierre

In the salons of early 18th-century Paris, the Abbé de Saint-Pierre was a figure of both respect and gentle ridicule—a man of boundless optimism in human reason and progress. A fixture at the French Academy, he was less a systematic philosopher and more a relentless projector of schemes for social betterment. His most famous work, 'Project for Perpetual Peace', envisioned a permanent 'European Union' of sovereign states that would arbitrate disputes and outlaw war, an idea that later fascinated thinkers like Rousseau and Kant. He applied the same utilitarian zeal to proposals on government reform, education, and language simplification. While contemporaries often smiled at his earnestness, his legacy lies in planting the audacious seed of collective security and international governance in the European imagination, concepts that would shape political thought for centuries.