We do not lose sight of the fact that socialism is not a mere economic system, but a philosophy, and that it is founded on a philosophical basis which conflicts with the very foundations of Christianity. We are only concerned with it here in its character of an economic system, and all we have attempted to show is that, as an economic system, it finds no support in the teaching of the scholastic writers. We do not pretend to suggest which of these two systems is more likely to bring salvation to the modern world; we simply wish to emphasise that they are two systems, and not one. One's inability to distinguish between Christ and Barabbas should not lead one to conclude that they are really the same person. INDEX Abelard, 14. _Acts of the Apostles_, 168. communism in, 44, 46. Adam, 140. and Eve, slavery the result of their sin, 92. Administrative occupations, position in _artes possessivae_, 143. Ægidius Romanus, 98, 197, 225. Agriculture, position in _artes possessivae_, 142, 143. its encouragement recommended, 143. Albertus Magnus, 16, 82, 176, 186, 197. Albigenses, the, belief in communism, 66. Alcuin, 14. Alexander of Hales, 176, 185. Alexander III., Pope, 187. attitude to usury, 174. Alfric, see _Colloquy of Archbishop, The_. Almsgiving, as justice, not charity, 69. duty of, 80. enforcement by the State, 85. summary of mediæval teaching on, 84. the early Church on, 52. Ambition, a virtue, 79. Ambrosius de Vignate, 191, 208. Ananias, 46, 52. Ancients, loss of economic teaching of, 15. Angelus de Periglis de Perusio, 209, 210. Antoine, 87, 172, 223. Antoninus of Florence, 9, 68, 79, 110, 122, 181, 196. Ape of Aristotle, the, _see_ Albertus Magnus. Apostles, the, attitude to manual labour, 223. attitude to private property and communism, 48. attitude to usury, 168. Apostles, the, fornication expressly forbidden by, 168. teaching regarding slavery, 89. Apostoli, the, belief in communism, 66. Aquinas, _see_ Thomas Aquinas. Aragon, personal rent charges permitted in, 205. Architecture, _see_ Manufacture. Archivio Giuridico, 225. Ardant, 69. Aristotle, 14, 16, 36, 97, 98, 142, 146, 169, 215, 219. as source for Thomas Aquinas, 62. attitude of Thomas Aquinas to his opinion, 94 _et seq._ Cossa on his influence, 17. his principles maintained through Thomas Aquinas, 19. his theory of slavery opposed to that of St. Augustine, 93. influence on controversies of the schools, 17. influence on mediæval thought, 16. renewed study of, 16. Arnold, 203. _Artes pecuniativae_, 142. _Artes possessivae_, 142. encouragement recommended by Aquinas, 143. Arnobius, 45. Ashley, Sir W.H., 3, 6, 7, 18, 21, 23, 27, 29, 30, 33, 40, 76, 105, 113, 126, 134, 146, 149, 175, 185, 186, 187, 188, 190, 191, 195, 196, 197, 198, 202, 203, 205, 206, 207, 211, 212. Augustinians, the, 195.