We're now going to talk about the main division that emerges in Islam shortly after the death of Muhammad. And that division is between Sunnis and Shias. And this division even exists today where roughly 90% of the world's 1.5 or 1.6 billion Muslims are Sunni and roughly 10% are Shia. And that 10% is concentrated mainly in places like Iran, Iraq, but they are spread throughout the Muslim world or the world in general. Now, the word Sunni comes from the word Sunnah, which is referring to examples of Muhammad. The word Shia comes from Shiatu Ali, which means followers of Ali or party of Ali. And we'll talk more about Ali in a little bit.