most Jewish philosophical works then existing. Aquinas pronounces himself energetically against the hypothesis of the eternity of the world, in agreement with both Christian and Jewish theology. But as this theory is attributed to Aristotle, he seeks to demonstrate that the latter did not express himself categorically on this subject. "The argument," said he, "which Aristotle presents to support this thesis is not properly called a demonstration, but is only a reply to the theories of those ancients who supposed that this world had a beginning and who gave only impossible proofs. There are three reasons for believing that Aristotle himself attached only a relative value to this reasoning..." In this, Aquinas paraphrases Maimonides' Guide for the Perplexed, where those reasons are given. Scholarly perspectives René Descartes Thomism began to decline in popularity in the modern period, which was inaugurated by René Descartes' works Discourse on the Method in 1637 and Meditations on First Philosophy in 1641. The Cartesian doctrines of mind–body dualism and the fallibility of the senses implicitly contradicted Aristotle and Aquinas: G. K. Chesterton In describing Thomism as a philosophy of common sense, G. K. Chesterton wrote: History J. A. Weisheipl emphasizes that within the Dominican Order the history of Thomism has been continuous since the time of Aquinas: An idea of the longstanding historic continuity of Dominican Thomism may be derived from the list of people associated with the Pontifical University of St. Thomas Aquinas. Outside the Dominican Order, Thomism has had varying fortunes leading some to periodize it historically or thematically. Weisheipl distinguishes "wide" Thomism, which includes those who claim to follow the spirit and basic insights of Aquinas and manifest an evident dependence on his texts, from "eclectic" Thomism which includes those with a willingness to allow the influence of other philosophical and theological systems in order to relativize the principles and conclusions of traditional Thomism. John Haldane gives an historic division of Thomism including 1) the period of Aquinas and his first followers from the 13th to 15th centuries, a second Thomism from the 16th to 18th centuries, and a Neo-Thomism from the 19th to 20th centuries. One might justifiably articulate other historical divisions on the basis of shifts in perspective on Aquinas' work including the period immediately following Aquinas' canonization in 1325, the period following the Council of Trent, and the period after the Second Vatican Council. Romanus Cessario thinks it better