At the same time, a political faction called the Stoic Opposition, led by a senator called Thrasea, was attempting to take a principled stand against Nero and those subsequent emperors whom they considered tyrants. Marcus would later mention his admiration for Cato, Thrasea, and others associated with them, which is intriguing because these Stoics had been famous opponents, or at least critics, of imperial rule. Emperor Nero, by contrast, was less tolerant of political dissent from philosophers, and he executed both Thrasea and Seneca.
