1. Aristotle, , Book II; , Book II, Chapter 8 — cumulative growth in the arts and sciences; the cycling of constitutions
2. Lucretius, , Book V, ll. 925–1457 — the natural emergence of civilization through necessity and invention
3. Augustine, , Books XV–XVIII; , Book XIII — providential history, the two cities, and the limits of earthly progress
4. Francis Bacon, ; , Book I — the idols of the mind and the method for progressive mastery of nature
5. Blaise Pascal, Preface to the Treatise on Vacuum — the cumulative knowledge of all generations as one learning man
6. Jean-Jacques Rousseau, ; — civilization as corruption, progress as regression
7. G.W.F. Hegel, , Introduction and Parts I–IV — history as the self-realization of Spirit toward freedom
8. John Stuart Mill, , Chapter 2; , Chapter 1 — free discussion as the engine of intellectual and political progress
9. Karl Marx, ; , Volume I, Chapters 14–15 — the dialectic of modes of production and the goal of communist history
10. Sigmund Freud, , Chapters VII–VIII — the psychic price of civilizational progress