 In 1695, Leibniz made his public entrée into European philosophy with a journal article titled "New System of the Nature and Communication of Substances".Between 1695 and 1705, he composed his "New Essays on Human Understanding", a lengthy commentary on John Locke's 1690 "An Essay Concerning Human Understanding", but upon learning of Locke's 1704 death, lost the desire to publish it, so that the "New Essays" were not published until 1765.The "Monadologie", composed in 1714 and published posthumously, consists of 90 aphorisms.