Moral progress
Parker, Theodore. "Of Justice and the Conscience." Ten Sermons of Religion. Boston: Crosby, Nichols, and Company/New York: Charles S. Francis and Company, 1853.
King, Martin Luther, Jr. "Remaining Awake Through a Great Revolution." 31 Mar. 1968, National Cathedral, Washington, DC, USA. Sermon.
Confucius. 論語 [The Analects]. c. 479 BCE.
Confucius. The Analects, edited and translated by Annping Chin. Penguin Classics, 2014.
King, Martin Luther, Jr. "The Man Who Was a Fool." Detroit Council of Churches' Noon Lenten Services. 6 Mar. 1961, Detroit, MI, USA.
Lec, Stanislaw. Unkempt Thoughts, translated by Jacek Galazka. St. Martin's Press, 1962. Originally published as Myśli nieuczesane [Uncombed Thoughts]. Wydawnictwo Literackie, 1957.
Surtees, Robert Smith. The Analysis of the Hunting Field. London: Rudolph Ackermann, 1846, ch. 1.
Parfit, Derek. Reasons and Persons. Oxford University Press, 1984.
Parfit, Derek. On What Matters. Vol. 3, Oxford University Press, 2017.
Bradley, Omar. "Armistice Day Speech, November 10, 1948." The Collected Writings of General Omar N. Bradley. Vol. 1, U. S. Government Printing Office, 1967. Originally a speech at an Armistice Day Celebration. 10 Nov. 1948, Boston Chamber of Commerence, Boston, MA, USA.