Herbert David Croly (January 23, 1869 - May 17, 1930) was an intellectual leader of the Progressive Movement as an editor, and political philosopher and a co-founder of the magazine The New Republic in early twentieth-century America. His political philosophy influenced many leading progressives including Theodore Roosevelt, as well as his close friends Judge Learned Hand and Supreme Court Justice Felix Frankfurter. His book, The Promise of American Life (1909) looked to the conservative spirit of effective government as espoused by Alexander Hamilton, combined with the democracy of Thomas Jefferson. The book was one of the most influential books in American political history, shaping the ideas of many intellectuals and political leaders. It also influenced the later New Deal.
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