Economic Policy and Democratic Thought: Pennsylvania, 1776-1860, (Harvard University Press, 1948).
The Liberal Tradition in America: An Interpretation of American Political Thought since the Revolution, (Harcourt, Brace & World, 1955, 2nd ed., 1991).
The Necessity of Choice: Nineteenth-century Political Thought, (Transaction Publishers, 1990).
共著
The Founding of New Societies: Studies in the History of the United States, Latin America, South Africa, Canada, and Australia, with Kenneth D. McRae, et al., (Harcout, Brace & World, 1964).