The Outline of History: Being a Plain History of Life and Mankind
CHAPTER XX. SERFS, SLAVES, SOCIAL CLASSES, AND FREE INDIVIDUALS
§ 1. The common man in ancient times 254
§ 2. The earliest slaves 256
§ 3. The first “independent” persons 259
§ 4. Social classes three thousand years ago 262
§ 5. Classes hardening into castes 266
§ 6. Caste in India 268
§ 7. The system of the Mandarins 270
§ 8. A summary of five thousand years 272