CrantorCrantor of Soli (Κράντωρ, gen.: Κράντορος; died 276/5 BC) was a Ancient Greek philosopher and member of the Old Academy who was the first philosopher to write commentaries on the works of Plato. Crantor probably born around the middle of the 4th century BC, at Soli in Cilicia (modern-day Turkey). He moved from Cilicia to Athens in order to study philosophy, where he became a pupil of Xenocrates and a friend of Polemon, and one of the most distinguished supporters of the philosophy of the older Academy.
XenocratesXenocrates (zəˈnɒkrəˌtiːz; Ξενοκράτης; c. 396/5 - 314/3 BC) of Chalcedon was a Greek philosopher, mathematician, and leader (scholarch) of the Platonic Academy from 339/8 to 314/3 BC. His teachings followed those of Plato, which he attempted to define more closely, often with mathematical elements. He distinguished three forms of being: the sensible, the intelligible, and a third compounded of the two, to which correspond respectively, sense, intellect and opinion.
ArcesilausArcesilaus (ˌɑːrsɛsɪˈleɪ.əs; Ἀρκεσίλαος; 316/5–241/0 BC) was a Greek Hellenistic philosopher. He was the founder of Academic Skepticism and what is variously called the Second or Middle or New Academy – the phase of the Platonic Academy in which it embraced philosophical skepticism. Arcesilaus succeeded Crates of Athens as the sixth scholarch of the Academy around 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 writers.
Platonic AcademyThe Academy (Akademía) was founded by Plato in 387 BC in Athens. Aristotle studied there for twenty years (367–347 BC) before founding his own school, the Lyceum. The Academy persisted throughout the Hellenistic period as a skeptical school, until coming to an end after the death of Philo of Larissa in 83 BC. The Platonic Academy was destroyed by the Roman dictator Sulla in 86 BC. The Akademia was a school outside the city walls of ancient Athens.