Answer:
The schism began with a disagreement about who should follow the Prophet Muhammad as leader of the Islamic faith he founded.
Step-by-step explanation:
Though the two major factions within Islam, Sunni and Shia, agree on the majority of core Islamic principles and practices, a deep rift between the two dates back 14 centuries. The split began with a disagreement about who should follow the Prophet Muhammad as leader of the Islamic faith he founded.