Factions, argued James Madison in Federalist No. 10, had ever been the bane of governments grounded in the consent of the governed. However, an improved political science informed the new charter of government that he and his fellow delegates drafted a few months before in Philadelphia over the course of the summer of 1787. Well-designed institutions that minimized freedom’s costs offered a more promising approach to preserving freedom. So effective is Madisonian political science that it provides remedies for such up-to-date threats to freedom as social media and the giant companies that monopolize the provision of information about us and about others.