We learn from that same great and cautious writer Hallam in his _History of Literature_ that there are traces of this theory and of other popular theories of the present day in the works of Giordano Bruno, the Neapolitan who was burnt at Rome by the Inquisition in 1600. It is curious to read the titles of his works and to think of Dugald Stewart’s remark about barrel-organs. For instance he wrote on “The Plurality of Worlds,” and on the universal “Monad,” a name familiar enough to the readers of _Vestiges of Creation_. He was a Pantheist, and, as Hallam says, borrowed all his theories from the eclectic philosophers, from Plotinus and the Neo-Platonists, and ultimately they were no doubt of Oriental origin. This is just what has been shown again and again to be the history of German Pantheism; it is a mere barrel-organ repetition of the Brahman metaphysics found in Hindu cosmogonies. Bruno’s theory regarding development of species was in Hallam’s words: “There is nothing so small or so unimportant but that a portion of spirit dwells in it; and this spiritual substance requires a proper subject to become a plant or an animal”; and Hallam in a note on this passage observes how the modern theories of equivocal generation correspond with Bruno’s. No doubt Hallam is right in saying that they are all of Oriental origin. Pythagoras borrowed from thence his kindred theory of the metempsychosis, or transmigration of souls. But he was more consistent than modern philosophers; he recognised a downward development as well as an upward, and made morality and immorality the crisis and turning-point of change—a bold lion developed into a brave warrior, a drunken sot developed into a wallowing pig, and Darwin’s slave-making ants, p. 219, would have been formerly Virginian cotton and tobacco growers. Perhaps Prometheus was the first Darwin of antiquity, for he is said to have begun his creation from below, and after passing from the invertebrate to the sub-vertebrate, from thence to the backbone, from the backbone to the mammalia, and from the mammalia to the manco-cerebral, he compounded man of each and all:— Fertur Prometheus addere principi Limo coactus particulam undique Desectam et insani leonis Vim stomacho apposuisse nostro.