In 1814, after decades of continental conflict, an alliance of European empires captured Paris and exiled Napoleon Bonaparte, defeating French military expansionism and establishing the Concert of Europe. This new coalition planted the seeds for today's international order, wedding the idea of a durable peace to multilateralism, diplomacy, philanthropy, and rights, and making Europe its center. Glenda Sluga reveals how at the end of the Napoleonic wars, new conceptions of the politics between states were the work not only of European statesmen but also of politically ambitious aristocratic and bourgeois men and women who seized the moment at an extraordinary crossroads in history. In this panoramic book, Sluga reinvents the study of international politics, its limitations, and its potential. She offers multifaceted portraits of the leading statesmen of the age, such as Tsar Alexander, Count Metternich, and Viscount Castlereagh, showing how they operated in the context of social networks often presided over by influential women, even as they entrenched politics as a masculine endeavor. Monumental in scope, this groundbreaking book chronicles the European women and men who embraced the promise of a new kind of politics in the aftermath of the Napoleonic wars, and whose often paradoxical contributions to modern diplomacy and international politics still resonate today.