The latent causes of faction are thus sown in the nature of man; and we see them everywhere brought into different degrees of activity, according to the different circumstances of civil society.

Madison, James. "No. 51: How to maintain: make the parts check each other. Also, a federal system divides power further.--Madison (or Hamilton)." The Federalist: A Commentary on the Constitution of the United States, edited by Robert Scigliano. The Modern Library, 2001.

Jefferson, Thomas. Notes on the State of Virginia, edited by Frank Shuffelton. Penguin Classics, 1998, query 18.

Hamilton, Alexander. "No. 15: Its great defect: can only legislate for states.--Hamilton." The Federalist: A Commentary on the Constitution of the United States, edited by Robert Scigliano. The Modern Library, 2001.