[667] Symonds, _Catholic Reaction_, I, 205. [618] Opere, IV, 7 ff. [619] Lea, _Inquis._, II, 250. [620] Symonds, _Catholic Reaction_, I, 207. [621] Yriarte, _Patricien de Venise_, 162, 439. [622] Lea, _Inquis._, III, 191-192, 238. [623] _Ibid._, 198. Collected cases in Fra Paolo Sarpi, _Della Inquis. de Venezia_, Opere, IV, 24. [624] Fritsch, _Eingeb. Sued-Afr._, 99. CHAPTER VI SLAVERY Origin and motives.--Slavery taught steady labor.--Servitude of group to group.--Slavery and polygamy.--Some men serve others.--Freedom and equality.--Figurative use of "slave."-- Ethnography of slavery.--Family slavery.--Slavery amongst North American savages.--Slavery in South America.--Slavery in Polynesia and Melanesia.--Slavery in the East Indies.--Slavery in Asia.--Slavery in Japan.--Slavery in higher civilization.-- Slavery amongst Jews.--Slavery in the classical states.-- Slavery at Rome.--Slave revolts.--Later Roman slavery.--Slaves in the civil wars; clientage.--Manumission. Natural liberty.-- Slavery as represented in the inscriptions.--Rise of freedom in industry.--Freedmen in the state.--Philosophers opponents of slavery.--The industrial colleges.--Laws changed in favor of slaves.--Christianity and slavery.--The colonate.-- Depopulation.--Summary view of Roman slavery.--The Therapeuts.--Slavery amongst the Germanic nations.--The sale of children.--Slavery and the state.--Slavery in Europe. Italy in the Middle Ages.--Slavery in France.--Slavery in Islam.-- Review of slavery in Islam.--Slavery in England.--Slavery in America.--Colonial slavery.--Slavery preferred by slaves.--The future of slavery.--Relation of slavery to the mores and to ethics.