Over the first half of the 20th century, Rabbi Stephen S. Wise (1874–1949) devoted himself to solving the most controversial social and political problems of his day: corruption in municipal politics, abuse of industrial workers, women’s second-class citizenship, nativism and racism, and global war. He considered his activities an effort to define “Americanism” and apply its principles toward humanity’s improvement. On the one hand, Wise joined a long tradition of American Christian liberals committed to seeing their fellow citizens as their equals and to grounding this egalitarianism in their religious beliefs. On the other hand, he was in the vanguard of the Jewish Reform, or what he referred to as the Liberal Judaism movement, with its commitment to apply Jewish moral teachings to improve the world. His life’s work demonstrated that the two—liberal democracy and Liberal Judaism—went hand in hand. And while concerned with equality and justice, Wise’s Americanism had a democratic elitist character. His advocacy to engage the public on the meaning of citizenship and the role of the state relied on his own Jewish, male, and economically privileged perspective as well as those of an elite circle of political and business leaders, intellectual trendsetters, social scientists, philanthropists, labor leaders, and university faculty. In doing so, Wise drew upon on Jewish liberal teachings, transformed America’s liberal tradition, and helped to remake American’s national understanding of itself.