The third leading Stoic after Cleanthes, and possibly the most productive philosopher of all time, having written 705 books, none of which survive (however, ancient books were relatively short; see also Dewey). Chrysippus was originally a pupil of Arcesilaus, and was converted to Stoicism by Cleanthes. He enjoyed a considerable reputation as a logician, and there is some evidence that he commanded the fundamental idea of a truth-function, which then lay dormant until the 20th century. He also held a cognitive theory of the emotions, which he thought consisted in judgements of the value of things.
Subjects: Classical Studies — Philosophy.