So strong is this propensity of mankind to fall into mutual animosities, that where no substantial occasion presents itself, the most frivolous and fanciful distinctions have been sufficient to kindle their unfriendly passions and excite their most violent conflicts.

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.

The Constitution of the United States. The Constitution of the United States and The Declaration of Independence. Written by Delegates of The Constitutional Convention. Racehorse, 2016, amend. 2.

Nietzsche, Friedrich. The Joyous Science, translated by R. Kevin Hill. Penguin Classics, 2019, bk. 3, no. 108.