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" But look for a moment at the spread of Christianity from the other side and what emerges is a far less easy picture. It is neither triumphant, nor joyful. It is a story of forced conversion and government persecution. It is a story in which great works of art are destroyed, buildings are defaced and liberties are removed. It is a story in which those who refused to convert were outlawed and, as the persecution deepened, were hounded and even executed by zealous authorities. The brief and sporadic Roman persecutions of Christians would pale in comparison to what the Christians inflicted on others—not to mention on their own heretics. If this seems implausible, then consider one simple fact. In the world today, there are over two billion Christians. There is not one single, true “pagan.” Roman persecutions left a Christianity vigorous enough not only to survive but to thrive and to take control of an empire. By contrast, by the time the Christian persecutions had finally finished, an entire religious system had been all but wiped from the face of the earth. "
― Catherine Nixey , The Darkening Age: The Christian Destruction of the Classical World