Croly followed up with his second work, ''Progressive Democracy''.<ref>[https://books.google.com/books?id=Lkleqx5Vb-IC&pg=PR10 The Unfinished City: New York and the Metropolitan Idea]</ref>
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Croly followed up with his second work, ''[[Progressive Democracy]]''.<ref>[https://books.google.com/books?id=Lkleqx5Vb-IC&pg=PR10 The Unfinished City: New York and the Metropolitan Idea]</ref>