

He consolidated the temporal and the spiritual leadership in his person before his death in 632. After Muhammad's death, his followers compiled those of his words regarded as coming directly from God into the Quran, the holy scriptures of Islam. Others of his sayings and teachings, recalled by those who had known him, became the hadith. The precedent of Muhammad's personal behavior is called the sunna. Together, these works form a comprehensive guide to the spiritual, ethical, and social life of the orthodox Sunni Muslim. The duties of Muslims form the five pillars of Islam, which set forth the acts necessary to demonstrate and reinforce the faith.

The ninth month of the Muslim calendar is Ramadan, a period of obligatory fasting in commemoration of Muhammad's receipt of God's revelation. Throughout the month, all but the sick and weak, pregnant or lactating women, soldiers on duty, travelers on necessary journeys, and young children are enjoined from eating, drinking, smoking, or sexual intercourse during the daylight hours. Those adults who are excused are obliged to endure an equivalent fast at their earliest opportunity. A festive meal breaks the daily fast and inaugurates a night of feasting and celebration. The pious well-to-do usually perform little or no work during this period, and some businesses close for all or part of the day. Because the months of the lunar year revolve through the solar year, Ramadan falls at various seasons in different years. A considerable test of discipline at any time of the year, a fast that falls in summertime imposes severe hardship on those who must do physical work. All Muslims, at least once in their lifetimes, are strongly encouraged to make the hajj to Mecca to participate in special rites held there during the twelfth month of the lunar calendar.
Muhammad instituted this requirement, modifying pre-Islamic custom, to emphasize sites associated with God and Abraham (Ibrahim), considered the founder of monotheism and father of the Arabs through his son Ismail. Other tenets of the Muslim faith include the jihad (holy war), and the requirement to do good works and to avoid all evil thoughts, words, and deeds. In addition, Muslims agree on certain basic principles of faith based on the teachings of the Prophet Muhammad: there is one God, who is a unitary divine being, in contrast to the trinitarian belief of Christians; Muhammad, the last of a line of prophets beginning with Abraham and including Moses (Musa) and Jesus (Isa), was chosen by God to present His message to humanity; and there is to be a general resurrection on the last, or judgment, day. During his lifetime, Muhammad was spiritual and temporal leader of the Muslim community.
Religious and secular law merged, and all Muslims traditionally have been subject to sharia, or religious law. A comprehensive legal system, sharia developed gradually through the first four centuries of the Islamic era, primarily through the accretion of interpretations and precedents set by various judges and scholars.
After Muhammad's death, Muslim community leaders chose Abu Bakr, the Prophet's father-in-law and one of his earliest followers, to succeed him. At that time, some persons favored Ali ibn Abu Talib, Muhammad's cousin and the husband of his daughter Fatima, but Ali and his supporters (the Shiat Ali, or Party of Ali) eventually recognized the community's choice. The next two caliphs (successors)--Umar, who succeeded in A.D. 634, and Uthman, who took power in 644--enjoyed the recognition of the entire community. When Ali finally succeeded to the caliphate in 656, Muawiyah, governor of Syria, rebelled in the name of his murdered kinsman Uthman. After the ensuing civil war, Ali moved his capital to the area of present-day Iraq, where he was murdered shortly thereafter.
Ali's death ended the last of the so-called four orthodox caliphates and the period in which the entire community of Islam recognized a single caliph. Muawiyah proclaimed himself caliph from Damascus. The Shiat Ali refused to recognize him or his line, the Umayyad caliphs, and withdrew in the great schism to establish the dissident sect, known as the Shia, who supported the claims of Ali's line to the caliphate based on descent from the Prophet. The larger faction, the Sunnis, adhered to the position that the caliph must be elected, and over the centuries they have represented themselves as the orthodox branch. Early in Islam's history the Sufism movement emerged.
It stressed the possibility of emotional closeness to God and mystical knowledge of God in contrast to the intellectual and legalistic emphasis of orthodox Sunni theology. By the twelfth century, this tendency had taken a number of forms. Orders, each emphasizing specific disciplines (ways) of achieving that closeness and knowledge, were organized. Disdained by orthodox Islamic theologians, Sufi orders nevertheless became an integral part of Islam, although their importance varied regionally. Data as of 1991
Local Character of belief and practice: Ethiopian Muslims are adherents of the dominant Sunni, or orthodox, branch of Islam. Shia are not represented in Ethiopia. The beliefs and practices of Ethiopian Muslims are embodied in a more or less integrated amalgam of three elements: the Islam of the Quran and the sharia, the worship of saints and the rituals and organization of religious orders, and the still-important remnant of pre-Islamic patterns. Islam in the traditional sense is dominant only on the Eritrean coast among Arab and Arab-influenced populations and in Harer and a few other towns. In general, the most important practices of the Islamic faith, particularly regular prayer and fasting during the month of Ramadan, are observed in urban centers rather than in the smaller towns and villages and more among settled peoples than among nomads. Records of the pilgrimage to Mecca by Ethiopian Muslims are scarce. Under Haile Selassie, Muslim communities could bring matters of personal and family law and inheritance before Islamic courts; many did so and probably continued to do so under the revolutionary regime.
However, many Muslims dealt with such matters in terms of customary law. For example, the Somali and other pastoralists tended not to follow the requirement that daughters inherit half as much property as sons, particularly when livestock was at issue. In parts of Eritrea, the tendency to treat land as the corporate property of a descent group (lineage or clan) precluded following the Islamic principle of division of property among one's heirs.
In Ethiopia's Muslim communities, as in neighboring Sudan and Somalia, the faithful are associated with, but not necessarily members of, specific orders. Nevertheless, although formal and informal attachment to Sufi orders is widespread, the emphasis is less on contemplative and disciplined mysticism than on the powers of the founders and other leaders of local branches of the orders. Most believe that these persons possess extraordinary powers to intercede with God and have the ability to promote the fertility of women and cure illness. In many cases, these individuals are recognized as saints. People visit their tombs to pray for their help or their intercession with God.
Data as of 1991. From Library of Congress