"The Promise of American Life" is a book by Herbert Croly that opposed aggressive unionization and supported economic planning to raise general quality of life in early twentieth-century America. It made a significant impact on many leading progressives, influencing Theodore Roosevelt to adopt the platform of "The New Nationalism" after reading it, and being popular with intellectuals and political leaders of the later "New Deal". Croly advocated a new political consensus that included as its core nationalism, but with a sense of social responsibility and care for the less fortunate. Since the power of big business, trusts, interest groups and economic specialization had transformed the nation in the latter part of the 19th century, Croly pressed for the centralization of power in the Federal Government to ensure democracy, a "New Nationalism".