English
v. 1-2. Philosophy -- v. 3. Philosophy of religion -- v. 4. Heterodox writings -- v. 5-8. Controversy -- v. 9. Scientific theories -- v. 10-13. Civilization -- v. 14. Development and morals -- v. 15-18. Politics -- v. 19. Popular literature -- v. 20. Explanations and index · 31
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