Lesson 3: Expansion of the Muslim World

Key Idea

After Muhammad’s death, Muslim armies began to expand their rule beyond Arabia. The neighboring Byzantine and Persian empires were weak after fighting each other for many years. This exhaustion made it easier for the unified and devoted Muslim forces to achieve swift victories.

The expansion was also successful because of the policies of the new rulers. They practiced religious toleration, allowing Jews and Christians to keep their faith. For many people living under harsh imperial rule, the arrival of the Muslims was a welcome change.

Key Idea

As the empire expanded, a new social structure took shape. Arab Muslims were at the top, followed by non-Arabs who converted to Islam. The next group included Jews and Christians, known as the People of the Book. They could practice their faith but had fewer rights. Enslaved people formed the lowest class.

Islam also introduced changes for women. It granted them new legal rights, such as the ability to own property and have more say in marriage. These rights were an improvement compared to the status of women in pre-Islamic Arabia.

Key Idea

After the Prophet Muhammad died, the Muslim community disagreed on who should be the next leader, or caliph. One group believed any devout Muslim could be chosen and supported Muhammad's companion, Abu Bakr. This group became known as the Sunni.

Another group insisted the leader must be a relative of Muhammad. They supported his cousin and son-in-law, Ali. These followers became known as the Shia. This disagreement over succession created a lasting division within Islam that continues to shape the Muslim world today.

Key Idea

After the first caliphs, the Muslim world was ruled by dynasties, where power passed through a family. The Umayyad dynasty was the first, expanding the empire and ruling from Damascus.

In 750, the Abbasid dynasty took control. They built a new capital city, Baghdad, in a region with a rich Persian history. This move shifted the empire's center eastward.