Arnold Geulincx (January 31, 1624 - November 1669), Flemish philosopher and logician. Professor at the University of Louvain, Belgium for 12 years, and later professor at the University of Leiden, Holland. Geulincx wrote all his works in Latin, and died before his principal books, namely Ethica and Metaphysica could be published. He summerized his philosophy as "Ita est, ergo ita sit", he believed in a "pre-established harmony," but not as Leibniz who 25 years after his death claimed such an idea to be the "best of all possible worlds." Rather Geulincx meant that it was sufficient for what he saw as a mankind far from perfection. January 31 is the 31st day of the year in the Gregorian Calendar. ... Events January 24 - Alfonso Mendez, appointed by Pope Gregory XV as Prelate of Ethiopia, arrives at Massawa from Goa. ... November is the eleventh month of the year in the Gregorian Calendar and one of four Gregorian months with the length of 30 days. ... Events Samuel Pepys stopped writing his diary. ... This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Leiden University in the city of Leiden, is the oldest still existing and most famous university in the Netherlands. ... Latin is the language that was originally spoken in the region around Rome called Latium. ... Gottfried Leibniz Gottfried Wilhelm von Leibniz (July 1, 1646 in Leipzig - November 14, 1716 in Hannover) was a German philosopher, scientist, mathematician, diplomat, librarian, and lawyer of Sorb descent. ...