It may be a reflection on human nature, that such devices should be necessary to control the abuses of government. But what is government itself, but the greatest of all reflections on human nature? If men were angels, no government would be necessary.

Madison, James. "No. 10: An extensive republic a remedy for mischiefs of faction.--Madison." The Federalist: A Commentary on the Constitution of the United States, edited by Robert Scigliano. The Modern Library, 2001.

"The Constitution of the United States." The Constitution of the United States and The Declaration of Independence. Racehorse, 2016, preamble.

Adams, Henry. "The Education of Henry Adams." Henry Adams: Democracy, Esther, Mont Saint Michel and Chartres, The Education of Henry Adams, edited by Ernest Samuels and Jayne Samuels. Library of America, 1983, ch. 1.