Note 206 — Chapter XIII · THE RISE OF MODERN FREETHOUGHT—(Continued)

His personal and literary influence was probably most powerful in respect of his eager propaganda of the Copernican doctrine, which he of his own force vitally expanded and made part of a pantheistic conception of the universe.206 Where Copernicus adhered by implication to the idea of an external and limitary sphere—the last of the eight of the Ptolemaic theory—Bruno reverted boldly to the doctrine of Anaximandros, and declared firmly for the infinity of space and of the series of the worlds. In regard to biology he makes an equivalent advance, starting from the thought of Empedocles and Lucretius, and substituting an idea of natural selection for that of creative providence.207 The conception is definitely thought out, and marks him as one of the renovators of scientific no less than of philosophic thought for the modern world; though the special paralysis of science under Christian theology kept his ideas on this side pretty much a dead letter for his own day. And indeed it was to the universal and not the particular that his thought chiefly and most enthusiastically turned. A philosophic poet rather than a philosopher or man of science, he yet set abroad for the modern world that conception of the physical infinity of the universe which, once psychologically assimilated, makes an end of the medieval theory of things. On this head he was eagerly affirmative; and the merely Pyrrhonic skeptics he assailed as he did the “asinine” orthodox, though he insisted on doubt as the beginning of wisdom.