The Qur’an states that Muhammad was ummi, interpreted as in Muslim tradition. According to Watt, the meaning of the Qur’anic term ummi is unscriptured rather than illiterate. Watt argues that a certain amount of writing was necessary for Muhammad to perform his commercial duties though it seems certain that he had not read any scriptures
2- SEAL OF THE PROPHETS SUNNI:
Muhammad is not the father of any of your men, but He is the Messenger of God and the Seal of the Prophets.
- Qur'an 33:40
The Rightly Guided Caliphs
The first four successors of Muhammad, known as rightly guided caliphs, ruled for some 30 years (see ). Their rule, together with that of Muhammad, is considered by most Muslims to constitute the ideal Islamic age. The second caliph, Umar, ruled from AD 634 to 644; he is credited with being the first caliph to found new Islamic cities, Al Basra (AD 635) and Kufah (AD 638).
The administration of the eastern and western Islamic provinces was coordinated from these two sites. After the third caliph, Uthman, was murdered by a group of Muslim mutineers, the fourth caliph, Ali, succeeded to power and moved his capital to Kufah in Iraq. From this capital he fought the different opposition factions. Among the leaders of these factions, Mu'awiyah, governor of the rich province of Syria and a relative of Uthman, outlasted Ali. After Ali's death in 661, Mu'awiyah founded the Umayyad dynasty, which ruled a united Islamic empire for almost a century. Under the Umayyads the Islamic capital was shifted to Damascus. (See )
Sunni Islam
Sunni Islam was defined during the early Abbasid period (beginning in AD 750), and it included the followers of four legal schools (the Malikis, Hanafis, Shafi'is, and Hanbalis). In contrast to the Shias, the Sunnis believed that leadership was in the hands of the Muslim community at large. The consensus of historical communities, not the decisions of political authorities, led to the establishment of the four legal schools. In theory a Muslim could choose whichever school of Islamic thought he or she wished to follow and could change this choice at will. The respect and popularity that the religious scholars enjoyed made them the effective brokers of social power and pitched them against the political authorities.
After the first four caliphs, the religious and political authorities in Islam were never again united under one institution. Their usual coexistence was underscored by a mutual recognition of their separate spheres of influence and their respective duties and responsibilities. Often, however, the two powers collided, and invariably any social opposition to the elite political order had religious undertones.
Meaning of the Word 'Caliph'
The word 'Caliph' is the English form of the Arabic word 'Khalifa,' which is short for Khalifatu Rasulil-lah. The latter expression means Successor to the Messenger of God, the Holy Prophet Muhammad (peace be on him). The title 'Khalifatu Rasulil-lah'. was first used for Abu Bakr, who was elected head of the Muslim community after the death of the Prophet.
The Significance of the Caliphate
The mission of Prophet Muhammad (peace be on him), like that of the earlier messengers of God, was to call people to the worship of and submission to the One True God. In practice, submission to God means to obey His injunctions as given in the Holy Qur'an and as exemplified by Sunnah (the practice of the Prophet). As successor to the Prophet, the Caliph was the head of the Muslim community and his primary responsibility was to continue in the path of the Prophet. Since religion was perfected and the door of Divine revelation was closed at the death of the Prophet, the Caliph was to make all laws in accordance with the Qur'an and the Sunnah. He was a ruler over Muslims but not their sovereign since sovereignty belongs to God alone. He was to be obeyed as long as he obeyed God. He was responsible for creating and maintaining conditions under which it would be easy for Muslims to live according to Islamic principles, and to see that justice was done to all. Abu Bakr, at the time he accepted the caliphate, stated his position thus:
"The weak among you shall be strong with me until their rights have been vindicated; and the strong among you shall he weak with me until, if the Lord wills, I have taken what is due from them... Obey me as long as I obey God and His Messenger. When I disobey Him and His Prophet, then obey me not."
The Rightly-Guided Caliphs (Al-Khulafa-ur-Rashidun)
Those Caliphs who truly followed in the Prophet's foot steps are called 'The Rightly-Guided Caliphs' (Al-Khulafa-ur Rashidun in Arabic). They are the first four Caliphs: Abu Bakr, 'Umar, Uthman and Ali. All four were among thc earliest and closest Companions of the Prophet (peace be on him). They lived simple and righteous lives and strove hard for the religion of God. Their justice was impartial, their treatment of others was kind and merciful, and they were one with the people - the first among equals. After these four, the later Caliphs assumed the manners of kings and emperors and the true spirit of equality of ruler and ruled diminished to a considerable extent in the political life of Muslims.
It should be clearly understood that the mission of Prophet Muhammad (peace be on him), and hence that of the Rightly-Guided Caliphs, was not political, social or economic reform, although such reforms were a logical consequence of the success of this mission, nor the unity of a nation and the establishment of an empire, although the nation did unite and vast areas came under one administration, nor the spread of a civilization or culture, although many civilizations and cultures developed, but only to deliver the message of God to all the peoples of the world and to invite them to submit to Him, while being the foremost among those who submitted.