The combination of Federalism and Republicanism which formed the substance of the system, did not constitute a progressive and formative political principle, but it pointed in the direction of a constructive formula.

It also influenced the later New Deal. Increasingly skeptical of the capacity of social welfare legislation to remedy social ills Croly argued that America's liberal promise could be redeemed only by syndicalist reforms involving workplace democracy. After returning to America Herbert Croly worked as an editor for an architectural magazine The Architectural Record from 1900 to 1906.

Croley was one of the founders of modern liberalism in the United States especially through his books essays and highly influential magazine founded in 1914 The New Republic. Increasingly skeptical of the capacity of social welfare legislation to remedy social ills Croly argued that America's liberal promise could be redeemed only by syndicalist reforms involving workplace democracy.