Platonic Academy
Around 266 BC, Pyrrho's student Arcesilaus became head of the Platonic Academy. He adopted skepticism as a central tenet of Platonism, making Platonism nearly the same as Pyrrhonism. After Arcesilaus, the Academics diverged from Pyrrhonism. This skeptical period of ancient Platonism, from Arcesilaus to Philo of Larissa, became known as the new Academy, although some ancient authors added further subdivisions, such as a middle Academy. Following the death of the Pyrrhonist Timon of Phlius, the Platonic Academy became the primary advocate of skepticism until the mid-first century BCE. While early Academic skepticism was influenced in part by Pyrrho, it grew more and more dogmatic until Aenesidemus, in the first century BCE, broke with the Academic skeptics and adopted Pyrrhonism, denouncing the Academy as "Stoics fighting against Stoics."