Within a century of Muhammad's recitations of the Qur'an, an Islamic state stretched from the Atlantic Ocean in the west to Central Asia in the east. This new polity soon broke into a civil war known to Islamic historians as the First Fitna, and was later affected by a Second Fitna. Through its history, there would be rival dynasties claiming the caliphate, or leadership of the Muslim world, and many Islamic states and empires offered only token obedience to a caliph unable to unify the Islamic world.

The subsequent empires of the Ummayyads, Abbasids, the Mughals, and the Seljuk Turk, Safavid Persia and Ottomans were among the largest and most powerful in the world. The peoples of the Islamic world gave rise to many centers of culture and science and produced notable scientists, astronomers, mathematicians, doctors, nurses and philosophers during the Golden Age of Islam. Technology flourished; there was much investment in economic infrastructure, such as irrigation systems and canals; stress on the importance of reading the Qur'an produced a comparatively high level of literacy in the general populace.

In the 18th and 19th centuries A.D., Islamic regions fell under the sway of European imperial powers. Following World War I, the remnants of the Ottoman empire were parcelled out as European protectorates. Since then, there has been no major widely-accepted claim to the caliphate (which had been last claimed by the Ottomans).

Although affected by various ideologies, such as communism, during much of the twentieth century, Islamic identity and Islam's salience on political questions have arguably increased during the late twentieth century and early twenty-first century. Rapid growth, western interests in Islamic regions, international conflicts and globalization influenced Islam's importance in shaping the world of the twenty-first century.

There are several Muslim versions of early Islamic history as written by the Sunni, Shi'a, and Ibadi sects. Nineteenth century Western scholars tended to privilege the Sunni versions; the Sunni are the largest sect, and their books and scholars were easily available. Over the last hundred years, Western scholars have become much more willing to question the orthodox view and to advance new theories and new narratives.