Miller, Jon, "Hugo Grotius", The Stanford Encyclopedia of Philosophy (Spring 2014 Edition), Edward N. Zalta (ed.): 'Hugo Grotius (1583-1645) [Hugo, Huigh or Hugeianus de Groot] was a towering figure in philosophy, political theory, law and associated fields during the seventeenth century and for hundreds of years afterwards. His work ranged over a wide array of topics, though he is best known to philosophers today for his contributions to the natural law theories of normativity which emerged in the later medieval and early modern periods'. Grotius was born on April 10, 1583 in Delft, Holland, his family was moderately prosperous, well-educated and ambitious. Grotius soon proved himself exceptional. In France he earned a law degree from the University of Orléans and established a law practice in The Hague. During a conflict about religious tolerance, he was imprisoned in 1618 because of his tolerant views and fled to Antwerp and then to Paris some years later. In Paris he wrote some of his most important works such as De iure belli ac pacis. More information in: Sassen, F. (1959), Geschiedenis van de Wijsbegeerte in Nederland tot het negentiende eeuw (pp.114-118). Amsterdam: Elsevier. Ziegenfuss, W. (1949). Philosophen-Lexicon. Handwörterbuch der Philosophie nach Personen (volume 1, pp. 422-423). Berlin: Walter de Gruyter.