Answer:
At first glance, there is one monolithic Islamic faith; essentially every Muslim believes in the Islamic ideal. But in practice, political and historical factors have contributed to making a difference within that community. The differences are, first and foremost, social and cultural in character.
Sunnis make up about 90 percent of the world's Muslim population, and Shiites make up about 10 percent. The essential differences between them are minimal and concern customs and practices. There are some other differences in nuance, often based on cultural factors, with little doctrinal significance.
Step-by-step explanation:
Shiites are concentrated in Iran, southern Iraq, and South Asia. They are characterized by a sense of exclusivity. Shiite beliefs center on the character of Ali. As the Prophet's cousin, son-in-law, he was also the first Muslim man. He was also the last in a series of four orthodox Caliphs who succeeded the Prophet as rulers within Islam. Ali's charisma, which implied chivalry and wisdom, is impeccable.
The Shiites believe that Ali should have been the first and not the fourth Caliph of Islam after the Prophet not only because he deserved such an appointment, but also because he was the Prophet's son-in-law.