One of the main things that distinguished the Stoics from the Epicureans was that the Stoics embraced public service and politics with enthusiasm and the Epicureans certainly did not. The extrovert Stoics were out there socializing, networking, competing for honor and advancement on the one hand; the introvert and cerebral Epicureans, were content to be in the Garden, literally and metaphorically, enjoying a more stress-free life among a small group of friends. It is understandable that the extroverts, apparently more popular and in demand (and in charge), should look down on the more retiring Epicureans, who rejected the polis and involvement in politics. Meanwhile, the bulk of the Greek population was illiterate and preoccupied with survival during a time when Greek hegemony was collapsing, and had no access to the teachings of Epicurus. It was the elite who rejected Epicurus.
Under the Roman Republic politics were relatively more responsive to the people. After the advent of the emperors and the assumption of military rule the regime became increasingly threatening and unpredictable. Independent thought and comment could result in death. As a result, Epicureanism became hugely popular and many people retired to the countryside, eschewing public life. Epicureanism was thus alive and well until the time of Constantine and the emergence of Christianity as a state religion. Thereafter, Epicureans were anathematized as anti-establishment and atheist, despite the fact that Epicurus was no atheist. Gods, he thought, existed, but they did not reward or punish humans, thus eliminating anxiety about angering them. Epicurean ideas on the after-life, however, were in stark contradiction to the fundamental belief of the Christians. It has to be pointed out that Epicureans were not picked on exclusively; many groups, including “heretical” Christian groups, ceased to be tolerated.