What was the Roman empire's views on Christianity at various points in its history? What caused them to change over time?

The Roman Empire's views on Christianity evolved over time. Initially, in the early 1st century CE, Christianity was seen as a relatively obscure religious sect within the larger Jewish community in the empire. Roman authorities largely ignored it as a marginal and insignificant movement.

However, as Christianity grew and spread, it started to draw more attention and faced occasional persecution. In 64 CE, Emperor Nero blamed Christians for the Great Fire of Rome and persecuted them, marking the first recorded official action against Christians by the Roman Empire. This persecution was sporadic and primarily aimed at specific individuals or groups rather than Christianity as a whole.

During the 2nd and early 3rd centuries CE, the Roman Empire generally adopted a policy of intermittently persecuting and tolerating Christianity. Emperors such as Trajan and Marcus Aurelius issued edicts against Christians based on their refusal to worship the imperial cult and participate in pagan rituals. However, these persecutions were not systematically organized and varied depending on the region and local officials.

The perception and treatment of Christianity changed significantly in the 4th century CE. The turning point occurred with the rise of Emperor Constantine, who converted to Christianity and issued the Edict of Milan in 313 CE. This edict granted religious freedom to all faiths, including Christianity, thus ending the systematic persecution. Christianity gradually gained favor under Constantine's rule and subsequent emperors. Eventually, in 380 CE, Emperor Theodosius I declared Christianity the state religion of the Roman Empire, marking a remarkable shift in official views.

Several factors contributed to the change in the Empire's stance on Christianity. The growth and persistence of the Christian community, its appeal to various social groups, as well as the influence of prominent Christian intellectuals, played a role in increasing awareness and acceptance of the faith.

Furthermore, the conversion of Emperor Constantine had a significant impact. His conversion, primarily driven by political motivations, allowed Christianity to gain imperial favor. Constantine's efforts to unify the empire religiously and his involvement in early Christian doctrinal disputes, such as the Council of Nicaea in 325 CE, provided Christianity with newfound legitimacy.

Overall, a combination of societal changes, political calculations, and the conversion of influential figures ultimately led to the transformation of the Roman Empire's views on Christianity, from sporadic persecution to eventual acceptance.