Revealed: the ancient propaganda war that led to the triumph of Christianity David Keys © Provided by The Independent New historical research is shedding fresh light on the birth of Christianity as a major religion. Although Christianity had existed since the mid-first century AD, it didn’t become the Roman empire’s main religion until more than 250 years later. Now, new research is revealing the dramatic pro-Christian and anti-Christian propaganda wars which preceded Christianity’s emergence as the empire’s dominant faith. An investigation by an American historian o...