Islamic thought

Islamic theology (kalām) and philosophy (falsafah) are two traditions of learning developed by Muslim thinkers who were engaged, on the one hand, in the rational clarification and defense of the principles of the Islamic religion (mutakallimūn) and, on the other, in the pursuit of the ancient (Greek and Hellenistic, or Greco-Roman) sciences (falāsifah). These thinkers took a position that was intermediate between the traditionalists, who remained attached to the literal expressions of the primary sources of Islamic doctrines (the Qurʾān, Islamic scripture; and the Hadith, sayings and traditions of the Prophet Muhammad) and who abhorred reasoning, and those whose reasoning led them to abandon the Islamic community (the ummah) altogether. The status of the believer in Islam remained in practice a juridical question, not a matter for theologians or philosophers to decide. Except in regard to the fundamental questions of the existence of God, Islamic revelation, and future reward and punishment, the juridical conditions for declaring someone an unbeliever or beyond the pale of Islam were so demanding as to make it almost impossible to make a valid declaration of this sort about a professing Muslim. In the course of events in Islamic history, representatives of certain theological movements, who happened to be jurists and who succeeded in converting rulers to their cause, made those rulers declare in favour of their movements and even encouraged them to persecute their opponents. Thus there arose in some localities and periods a semblance of an official, or orthodox, doctrine.
Origins, nature, and significance of Islamic theology
Early developments

The beginnings of theology in the Islamic tradition in the second half of the 7th century are not easily distinguishable from the beginnings of a number of other disciplines—Arabic philology, Qurʾānic interpretation, the collection of the sayings and deeds of Muhammad (Hadith), jurisprudence (fiqh), and historiography. Together with these other disciplines, Islamic theology is concerned with ascertaining the facts and context of the Islamic revelation and with understanding its meaning and implications as to what Muslims should believe and do after the revelation had ceased and the Islamic community had to chart its own way. During the first half of the 8th century, a number of questions—which centred on God’s unity, justice, and other attributes and which were relevant to human freedom, actions, and fate in the hereafter—formed the core of a more-specialized discipline, which was called kalām (“speech”) because of the rhetorical and dialectical “speech” used in formulating the principal matters of Islamic belief, debating them, and defending them against Muslim and non-Muslim opponents. Gradually, kalām came to include all matters directly or indirectly relevant to the establishment and definition of
religious beliefs, and it developed its own necessary or useful systematic rational arguments about human knowledge and
the makeup of the world. Despite various efforts by later thinkers to fuse the problems of kalām with those of philosophy (and mysticism), theology preserved its relative independence from philosophy and other nonreligious sciences. It remained true to its original traditional and religious point of view, confined itself within the limits of the Islamic revelation, and assumed that these limits as it understood them were identical with the limits of truth.

The Hellenistic legacy
The pre-Islamic and non-Islamic legacy with which early Islamic theology came into contact included almost all the religious thought that had survived and was being defended or disputed in Egypt, Syria, Iran, and India. It was transmitted by learned representatives of various Christian, Jewish, Manichaean (members of a dualistic religion founded by Mani, an Iranian prophet, in the 3rd century), Zoroastrian (members of a monotheistic, but later dualistic, religion founded by Zoroaster, an Iranian prophet who lived before the 6th century bce), Indian (Hindu and Buddhist, primarily), and Ṣābian (star worshippers of Harran often confused with the Mandaeans) communities and by early converts to Islam conversant with the teachings, sacred writings, and doctrinal history of the religions of these areas. At first, access to this legacy was primarily through conversations and disputations with such men, rather than through full and accurate translations of sacred texts or theological and philosophic writings, although some translations from Pahlavi (a Middle Persian dialect), Syriac, and Greek must also have been available
The characteristic approach of early Islamic theology to non-Muslim literature was through oral disputations, the starting points of which were the statements presented or defended (orally) by the opponents. Oral disputation continued to be used in theology for centuries, and most theological writings reproduce or imitate that form. From such oral and written disputations, writers on religions and sects collected much of their information about non-Muslim sects. Much of Hellenistic (post-3rd-century-bce Greek cultural), Iranian, and Indian religious thought was thus encountered in an informal and indirect manner.
From the 9th century onward, theologians had access to an increasingly larger body of translated texts, but by then they had taken most of their basic positions. They made a selective use of the translation literature, ignoring most of what was not useful to them until the mystical theologian al-Ghazālī (flourished 11th–12th centuries) showed them the way to study it, distinguish between the harmless and harmful doctrines contained in it, and refute the latter. By this time Islamic theology had coined a vast number of technical terms, and theologians (e.g., al-Jāḥiẓ) had forged Arabic into a versatile language of science; Arabic philology had matured; and the religious sciences (jurisprudence, the study of the Qurʾān, Hadith, criticism, and history) had developed complex techniques of textual study and interpretation. The 9th-century translators availed themselves of these advances to meet the needs of patrons. Apart from demands for medical and mathematical works, the translation of Greek learning was fostered by the early ʿAbbāsid caliphs (8th–9th centuries) and their viziers as additional weapons (the primary weapon was theology itself) against the threat of Manichaeism and other subversive ideas that went under the name zandaqah (“heresy” or “atheism”).
Theology and sectarianism
Despite the notion of a unified and consolidated community, as taught by the Prophet Muhammad, serious differences arose within the Muslim community immediately after his death. According to the Sunnis—the traditionalist faction whose followers now constitute the majority branch of Islam—the Prophet had designated no successor. Thus, the Muslims at Medina decided to elect a chief. Two of Muhammad’s fathers-in-law, who were highly respected early converts as well as trusted lieutenants, prevailed upon the Medinans to elect a leader who would be accepted by the Quraysh, Muhammad’s tribe, and the choice fell upon Abū Bakr, father of the Prophet’s favoured wife, ʿĀʾishah. All of this occurred before the Prophet’s burial (under the floor of ʿĀʾishah’s hut, alongside the courtyard of the mosque).
According to the Shīʿites, however, the Prophet had designated as his successor his son-in-law ʿAlī ibn Abī Ṭālib, husband of his daughter Fāṭimah and father of his only surviving grandsons, Ḥasan and Ḥusayn. His preference was general knowledge. Yet, while ʿAlī and the Prophet’s closest kinsmen were preparing the body for burial, Abū Bakr, ʿUmar, and Abū ʿUbaydah, from Muhammad’s companions in the Quraysh tribe, met with the leaders of the Medinans and agreed to elect the aging Abū Bakr as the successor (khalīfah, hence “caliph”) of the Prophet. ʿAlī and his kinsmen were dismayed but agreed for the sake of unity to accept the fait accompli because ʿAlī was still young.

After the murder of ʿUthmān, the third caliph, ʿAlī was invited by the Muslims at Medina to accept the caliphate. Thus, ʿAli became the fourth caliph (656–661), but the disagreement over his right of succession brought about a major schism in Islam, between the Shīʿites—those loyal to ʿAlī—and the Sunni “traditionalists.” Athough their differences were in the first instance political, arising out of the question of leadership, theological differences developed over time.
The Khārijites

During the reign of the third caliph, ʿUthmān, certain rebellious groups accused the caliph of nepotism and misrule, and the resulting discontent led to his assassination. The rebels then recognized the Prophet’s cousin and son-in-law, ʿAlī, as ruler but later deserted him and fought against him, accusing him of having committed a grave sin in submitting his claim to the caliphate to arbitration. The word khāraju, from which khārijī is derived, means “to withdraw,” and the Khārijites were seceders who believed in active dissent or rebellion against a state of affairs they considered to be gravely impious.
The basic doctrine of the Khārijites was that a person or a group who committed a grave error or sin and did not sincerely repent ceased to be Muslim. Mere profession of the faith—“there is no god but God; Muhammad is the prophet of God”—did not make a person a Muslim unless this faith was accompanied by righteous deeds. In other words, good works were an integral part of faith and not extraneous to it. The second principle that flowed from their aggressive idealism was militancy, or jihad, which the Khārijites considered to be among the cardinal principles, or pillars, of Islam. Contrary to the orthodox view, they interpreted the Qurʾānic command about “enjoining good and forbidding evil” to mean the vindication of truth through the sword. The placing of these two principles together made the Khārijites highly inflammable fanatics, intolerant of almost any established political authority. They incessantly resorted to rebellion and, as a result, were virtually wiped out during the first two centuries of Islam.

Because the Khārijites believed that the basis of rule was righteous character and piety alone, any Muslim, irrespective of race, colour, and sex, could, in their view, become ruler—provided he or she satisfied the conditions of piety. This was in contrast to the claims of the Shīʿites (the party of Muhammad’s son-in-law, ʿAlī) that the ruler must belong to the family of the Prophet and in contrast to the doctrine of the Sunnis (followers of the Prophet’s way) that the head of state must belong to the Prophet’s tribe, the Quraysh.

A moderate group of the Khārijites, the Ibāḍīs, avoided extinction, and its members are to be found today in North Africa and in Oman and in parts of East Africa, including the island of Zanzibar. The Ibāḍīs do not believe in aggressive methods and, throughout medieval Islam, remained dormant. Because of the interest of 20th-century Western scholars in the sect, the Ibāḍīs became active and began to publish their classical writings and their own journals.