[Footnote: It may be noted that John Wilkins (Bishop of Chester) published in 1638 a little book entitled Discovery of a New World, arguing that the moon is inhabited. A further edition appeared in 1684. He attempted to compose a universal language (Sprat, Hist. of Royal Society, p. 251). His Mercury or the Secret and Swift Messenger (1641) contains proposals for a universal script (chap. 13). There is also an ingenious suggestion for the communication of messages by sound, which might be described as an anticipation of the Morse code. Wilkins and another divine, Seth Ward, the Bishop of Salisbury, belonged to the group of men who founded the Royal Society.] Men did not look far into the future; they did not dream of what the world might be a thousand or ten thousand years hence. They seem to have expected quick results. Even Sprat thinks that "the absolute perfection of the true philosophy" is not far off, seeing that "this first great and necessary preparation for its coming"--the institution of scientific co-operation--has been accomplished. Superficial and transient though the popular enthusiasm was, it was a sign that an age of intellectual optimism had begun, in which the science of nature would play a leading role. CHAPTER V. THE PROGRESS OF KNOWLEDGE: FONTENELLE 1. Nine months before the first part of Perrault's work appeared a younger and more brilliant man had formulated, in a short tract, the essential points of the doctrine of the progress of knowledge. It was Fontenelle. Fontenelle was an anima naturaliter moderna. Trained in the principles of Descartes, he was one of those who, though like Descartes himself, too critical to swear by a master, appreciated unreservedly the value of the Cartesian method. Sometimes, he says, a great man gives the tone to his age; and this is true of Descartes, who can claim the glory of having established a new art of reasoning. He sees the effects in literature. The best books on moral and political subjects are distinguished by an arrangement and precision which he traces to the esprit geometrique characteristic of Descartes. [Footnote: Sur l'utilite des mathematiques el de la physique (Oeuvres, iii. p. 6, ed. 1729).] Fontenelle himself had this "geometrical mind," which we see at its best in Descartes and Hobbes and Spinoza.