Council of Chalcedon's Schism Spark

In 451 CE, the Council of Chalcedon declared that Christ existed "in two natures," fully divine and fully human. But when the Greek terms were translated into Coptic and Syriac, the wording sounded like outright heresy, even though the intent was close to orthodox. This linguistic gap helped fuel the Miaphysite schism, putting Christians in Egypt and Syria at odds with Constantinople. When Muslim armies swept in two centuries later, many locals sided with them over the Byzantines, setting the stage for Egypt and Syria to transform from the heartlands of Eastern Christianity into enduring strongholds of Islam.

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