Physiocratic tendencies, 28 f., 30, 41, 89, 110, 140, 149. _See also_ Exchange; Production. Pindar, 83. Plato, 9, 11, 12, 13, 14, 15, 17, 19, 22-62, 63, 64, 65, 66, 69, 70, 71, 74, 75, 78, 79, 81, 82, 84, 85, 86, 87, 88, 90, 91, 93, 94, 95, 96, 97, 99, 100, 102, 104, 106, 107, 108, 111, 115, 116, 118, 119, 120, 121, 122, 123, 124, 125, 127, 128, 131, 133, 134, 135, 136, 137, 138, 139, 140, 142, 144, 145, 148, 149. Platon, G., 153. Plutarch, 125, 126, 127, 140, 143 f. Poehlmann, 7, 20, 21, 29, 32, 33, 36, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 61, 62, 74, 75, 76, 101, 105, 106, 112, 117, 119, 120, 124, 140, 141, 142, 143, 144, 145, 153. Pohlenz, 53, 56, 57. Pollux, 93. Polybius, 143 f. Population, 45 f., 59, 74, 115, 120. Porphyry, 52, 126, 143. Poverty, 14, 15, 27, 47, 48, 50, 55, 56, 59, 60, 74, 75, 78, 79, 87, 109, 115, 120, 130, 132, 133, 138, 139, 140, 144, 147. Prices, regulation of, 43, 45, 47, 108, 110, 147. Private property. _See_ Socialism. Prodicus, 17. Production, 27-37, 66-69, 74, 83, 88-93, 96, 146, 149. _See also_ Industry; Physiocratic tendencies; and the Greek index. Profits, 46, 74, 109, 110, 116. Protagoras, 17. Publicity, 45, 60, 61, 147. Pythagoras, 15, 52. Quesnay, 89. Rambaud, 153. Rassow, 108. Reciprocity, 34, 41, 96, 146. Regnier, 153. Ricardo. _See_ Ricardian economy. Ritchie, 83. Robin, 22, 27, 28, 37, 43, 52, 153. Rodbertus, 20. Roscher, 9, 18, 32, 72, 148, 153. Rousseau, 131, 143, 149. Ruskin, 9, 11, 23, 24, 25, 26, 27, 30, 32, 33, 34, 35, 37, 38, 39, 40, 42, 44, 45, 46, 55, 61, 63, 64, 67, 87, 92, 93, 95, 99, 100, 101, 105, 109, 110, 111, 135, 137, 138, 145, 149, 150, 154. Salvio, 154. Sappho, 14. Say, 148. Schaeffle, 112. Schneider, 154. Schoenberg, 11. Schrohl, 134, 136, 154. Schulte, 43 f., 154. Seligman, 11. Seneca, 130, 139, 141. Sewall, 64, 83, 154. Shorey, 18, 28, 36, 55, 56, 58, 62, 99, 154. Silver, 40, 54, 65, 72, 133, 137. Simey, 72, 134, 154. Slavery, 16, 18, 21, 32, 37 f., 62, 67, 70, 86, 91, 92, 94, 95, 97-101, 123, 126, 128, 129, 132, 133, 142, 147. Smith, Adam, 32, 34, 35, 36, 37, 41, 64, 71, 75, 82, 86, 91, 92, 93, 115, 149. Social contract, 15, 16, 22, 119, 130, 146. Social origins, 22, 34, 119 f., 146. Socialism and communism, 12 f., 45, 51, 53, 79, 147, 151; in Aristotle, 96, 105, 118-24; in Greece, 12 f., 51, 143; in _Laws_, 58-62; in _Republic_, 48, 49, 50, 54-58; in Xenophon, 75 f.; in other writers, 15, 52-54, 79 f., 130, 140 f., 142-45. Socrates, 22, 26, 31, 57, 63, 67, 69, 73, 74, 129, 134, 136, 144. Solon, 13, 14. Sophists, 16, 17, 18, 22, 36, 73, 97, 111, 119, 130, 131, 142. Souchon, 7, 10, 17, 31, 36, 37, 41, 48, 49, 52, 53, 55, 57, 62, 72, 82, 88, 89, 93, 104, 106, 123, 124, 141, 142, 143, 148, 150, 154. Spencer, 35. Speusippus, 125. Stein, 55, 140, 154. Steinhart-Mueller, 134.