High Quality Content by WIKIPEDIA articles Arcesilaus (Greek: Ἀρκεσίλαος) (316/5-241/0 BC) was a Greek philosopher and founder of the Second or Middle Academy-the phase of Academic skepticism. Arcesilaus succeeded Crates as the sixth head (scholarch) of the Academy c. 264 BC. He did not preserve his thoughts in writing, so his opinions can only be gleaned second-hand from what is preserved by later...