 While the new idea of associating modal terms with simultaneous alternatives was used also in thirteenth-century theology, it was not often discussed in philosophical contexts at that time. The increasing acceptance of Aristotle’s philosophy gave support to traditional modal paradigms, as is seen in Robert Kilwardby’s influential commentary on Aristotle’s Prior Analytics, in which modal syllogistic is treated as an essentialist theory of the structures of being. There were analogous discussions of philosophical and theological modalities in Arabic philosophy. Arabic modal theories influenced Latin discussions mainly through the translations of Averroes’s works.