Ibn Rushd ( Averroës ), medieval Latin AVERROËS, also called IBN RUSHD, Arabic in full ABU AL-WALID MUHAMMAD IBN AHMAD IBN MUHAMMAD IBN RUSHD (b. 1126, Cordoba--d. 1198, Marrakech, Almohad Empire), influential Islamic religious philosopher who integrated Islamic traditions and Greek thought. At the request of the caliph Ibn at-Tufayl he produced a series of summaries and commentaries on most of Aristotle’s works (1162-95) and on Plato’s Republic, which exerted considerable influence for centuries. He wrote the Decisive Treatise on the Agreement Between Religious Law and Philosophy (Fasl), Examination of the Methods of Proof Concerning the Doctrines of Religion (Manahij), and The Incoherence of the Incoherence (Tahafut) at-Tahafut, all in defense of the philosophical study of religion against the theologians (1179-80).


Early life.

Averroës was born into a distinguished family of jurists at Cordoba and died at Marrakesh, the North African capital of the Almohad (al-Muwahhidun) dynasty. Thoroughly versed in the traditional Muslim sciences (especially exegesis of the Qur`an--Islamic scripture--and Hadith, or Traditions, and fiqh, or Law), trained in medicine, and accomplished in philosophy, Averroës rose to be chief qadi (judge) of Cordoba (Qurtubah), an office also held by his grandfather (of the same name) under the Almoravids (al-Murabitun). After the death of the philosopher Ibn Tufayl, Averroës succeeded him as personal physician to the caliphs Abu Ya’qub Yusuf in 1182 and his son Abu Yusuf Ya’qub in 1184. In 1169 Ibn Tufayl introduced Averroës to Abu Ya’qub, who, himself a keen student of philosophy, frightened Averroës with a question concerning whether the heavens were created or not. The caliph answered the question himself, put Averroës at ease, and sent him away with precious gifts after a long conversation that proved decisive for Averroës’ career. Soon afterward Averroës received the ruler’s request to provide a badly needed correct interpretation of the Greek philosopher Aristotle’s philosophy, a task to which he devoted many years of his busy life as judge, beginning at Seville and continuing at Cordoba. The exact year of his appointment as chief qadi of Cordoba, one of the key posts in the government (and not confined to the administration of justice), is not known.


Commentaries on Aristotle.

Between 1169 and 1195 Averroës wrote a series of commentaries on most of Aristotle’s works (e.g., the Organon, De anima, Physica, Metaphysica, De partibus animalium, Parva naturalia, Meteorologica, Rhetorica, Poetica, and the Nicomachean Ethics). He wrote summaries, and middle and long commentaries--often two or all three kinds on the same work. Aristotle’s Politica was inaccessible to Averroës; therefore he wrote a commentary on Plato’s Republic (which is both a paraphrase and a middle commentary in form). All of Averroës’ commentaries are incorporated in the Latin version of Aristotle’s complete works. They are extant in the Arabic original or Hebrew translations or both, and some of these translations serve in place of the presumably lost Arabic originals; e.g., the important commentaries on Aristotle’s Nicomachean Ethics and on Plato’s Republic.


Averroës’ commentaries exerted considerable influence on Jews and Christians in the following centuries. His clear, penetrating mind enabled him to present competently Aristotle’s thought and to add considerably to its understanding. He ably and critically used the classical commentators Themistius and Alexander of Aphrodisias and the falasifah (Muslim philosophers) al-Farabi, Avicenna (Ibn Sina), and his own countryman Avempace (Ibn Bajjah). In commenting on Aristotle’s treatises on the natural sciences, Averroës showed considerable power of observation.


Averroës’ defense of philosophy.

His own first work is on General Medicine (Kulliyat, Latin Colliget), written between 1162 and 1169. Only a few of his legal writings and none of his theological writings are preserved. Undoubtedly his most important writings are three closely connected religious-philosophical polemical treatises, composed in the years 1179 and 1180: the Fasl with its Appendix: Manahij; and Tahafut at-Tahafut in defense of philosophy. In the two first named Averroës stakes a bold claim: only the metaphysician employing certain proof (syllogism) is capable and competent (as well as obliged) to interpret the doctrines contained in the prophetically revealed law (Shar’ or Shari’ah), and not the Muslim mutakallimun (dialectic theologians), who rely on dialectical arguments. To establish the true, inner meaning of religious beliefs and convictions is the aim of philosophy in its quest for truth. This inner meaning must not be divulged to the masses, who must accept the plain, external meaning of Scripture contained in stories, similes, and metaphors. Averroës applied Aristotle’s three arguments (demonstrative, dialectical, and persuasive--i.e., rhetorical and poetical) to the philosophers, the theologians, and the masses. The third work is devoted to a defense of philosophy against his predecessor al-Ghazali’s telling attack directed against Avicenna and al-Farabi in particular. Spirited and successful as Averroës’ defense was, it could not restore philosophy to its former position, quite apart from the fact that the atmosphere in Muslim Spain and North Africa was most unfavourable to the unhindered pursuit of speculation. As a result of the reforming activity of Ibn Tumart (c. 1078-1130), aimed at restoring pure monotheism, power was wrested from the ruling Almoravids, and the new Berber dynasty of the Almohads was founded, under whom Averroës served. In jurisprudence the emphasis then shifted from the practical application of Muslim law by appeal to previous authority to an equal stress on the study of its principles and the revival of independent legal decision on the basis of Ibn Tumart’s teaching. Of perhaps even more far-reaching significance was Ibn Tumart’s idea of instructing the heretofore ignorant masses in the plain meaning of the Shari’ah so that practice would be informed with knowledge. These developments were accompanied by the encouragement of the falasifah--”those who,” according to Averroës’ Fasl, “follow the way of speculation and are eager for a knowledge of the truth”--to apply demonstrative arguments to the interpretation of the theoretical teaching of the Shari’ah. But with the hands of both jurists and theologians thus strengthened, Averroës’ defense of philosophy continued to be conducted within an unfavourable atmosphere.


Averroës himself acknowledged the support of Abu Ya’qub, to whom he dedicated his Commentary on Plato’s Republic. Yet Averroës pursued his philosophical quest in the face of strong opposition from the mutakallimun, who, together with the jurists, occupied a position of eminence and of great influence over the fanatical masses. This may explain why he suddenly fell from grace when Abu Yusuf--on the occasion of a jihad (holy war) against Christian Spain--dismissed him from high office and banished him to Lucena in 1195. To appease the theologians in this way at a time when the caliph needed the undivided loyalty and support of the people seems a more convincing reason than what the Arabic sources tell us (attacks on Averroës by the mob, probably at the instigation of jurists and theologians). But Averroës’ disgrace was only short-lived--though long enough to cause him acute suffering--since the caliph recalled Averroës to his presence after his return to Marrakesh. After his death, Averroës was first buried at Marrakesh, and later his body was transferred to the family tomb at Cordoba.


It is not rare in the history of Islam that the rulers’ private attachment to philosophy and their friendship with philosophers goes hand in hand with official disapproval of philosophy and persecution of its adherents, accompanied by the burning of their philosophical writings and the prohibition of the study of secular sciences other than those required for the observance of the religious law. Without caliphal encouragement Averroës could hardly have persisted all his life in his fight for philosophy against the theologians, as reflected in his Commentary on Plato's Republic, in such works as the Fasl and Tahafut at-Tahafut, and in original philosophical treatises (e.g., about the union of the active intellect with the human intellect). It is likely that the gradual estrangement of his two masters and patrons from Ibn Tumart’s theology and their preoccupation with Islamic law also helped him. That Averroës found it difficult to pursue his philosophical studies alongside the conscientious performance of his official duties he himself reveals in a few remarks scattered over his commentaries; e.g., in that on Aristotle’s De partibus animalium.


Contents and significance of works.

To arrive at a balanced appraisal of Averroës’ thought it is essential to view his literary work as a whole. In particular, a comparison of his religious-philosophical treatises with his Commentary on Plato’s Republic shows the basic unity of his attitude to the Shari’ah dictated by Islam and therefore determining his attitude to philosophy, more precisely to the nomos, the law of Plato’s philosopher-king. It will then become apparent that there is only one truth for Averroës, that of the religious law, which is the same truth that the metaphysician is seeking. The theory of the double truth was definitely not formulated by Averroës, but rather by the Latin Averroists. Nor is it justifiable to say that philosophy is for the metaphysician what religion is for the masses. Averroës stated explicitly and unequivocally that religion is for all three classes; that the contents of the Shari’ah are the whole and only truth for all believers; and that religion’s teachings about reward and punishment and the hereafter must be accepted in their plain meaning by the elite no less than by the masses. The philosopher must choose the best religion, which, for a Muslim, is Islam as preached by Muhammad, the last of the prophets, just as Christianity was the best religion at the time of Jesus, and Judaism at the time of Moses.


It is significant that Averroës could say in his Commentary on Plato’s Republic that religious law and philosophy have the same aim and in the Fasl that “philosophy is the companion and foster-sister of the Shari’ah." Accepting Aristotle’s division of philosophy into theoretical (physics and practical (ethics and politics), he finds that the Shari’ah teaches both to perfection: abstract knowledge commanded as the perception of God, and practice--the ethical virtues the law enjoins (Commentary on Plato’s Republic). In the Tahafut he maintains that “the religious laws conform to the truth and impart a knowledge of those actions by which the happiness of the whole creation is guaranteed.” There is no reason to question the sincerity of Averroës. These statements reflect the same attitude to law and the same emphasis on happiness. Happiness as the highest good is the aim of political science. As a Muslim, Averroës insists on the attainment of happiness in this and the next life by all believers. This is, however, qualified by Averroës as the disciple of Plato: the highest intellectual perfection is reserved for the metaphysician, as in Plato’s ideal state. But the Muslim’s ideal state provides for the happiness of the masses as well because of its prophetically revealed law, which is superior to the Greek nomos (law) for this reason. The philosopher Averroës distinguishes between degrees of happiness and assigns every believer the happiness that corresponds to his intellectual capacity. He takes Plato to task for his neglect of the third estate because Averroës believes that everyone is entitled to his share of happiness. Only the Shari’ah of Islam cares for all believers. It legitimates speculation because it demands that the believer should know God. This knowledge is accessible to the naive believer in metaphors, the inner meaning of which is intelligible only to the metaphysician with the help of demonstration. On this point all falasifah are agreed, and all recognize the excellence of the Shari’ah stemming from its divinely revealed character. But only Averroës insists on its superiority over the nomos.


Insisting on the prerogative of the metaphysician--understood as a duty laid upon him by God--to interpret the doctrines of religion in the form of right beliefs and convictions (like Plato’s philosopher-king), he admits that the Shari’ah contains teachings that surpass human understanding but that must be accepted by all believers because they contain divinely revealed truths. The philosopher is definitely bound by the religious law just as much as the masses and the theologians, who occupy a position somewhere in between. In his search for truth the metaphysician is bound by Arabic usage, as is the jurist in his legal interpretations, though the jurist uses subjective reasoning only, in contrast to the metaphysician’s certain proof. This means that the philosopher is not bound to accept what is contradicted by demonstration. He can, thus, abandon belief in the creation out of nothing since Aristotle demonstrated the eternity of matter. Hence creation is a continuing process. Averroës sought justification for such an attitude in the fact that a Muslim is bound only by consensus (ijma’) of the learned in a strictly legal context where actual laws and regulations are concerned. Yet, since there is no consensus on certain theoretical statements, such as creation, he is not bound to conform. Similarly, anthropomorphism is unacceptable, and metaphorical interpretation of those passages in Scripture that describe God in bodily terms is necessary. And the question whether God knows only the universals, but not the particulars, is neatly parried by Averroës in his statement that God has knowledge of particulars but that his knowledge is different from human knowledge. These few examples suffice to indicate that ambiguities and inconsistencies are not absent in Averroës’ statements.


The Commentary on Plato’s Republic reveals a side of Averroës that is not to be found in his other commentaries. While he carried on a long tradition of attempted synthesis between religious law and Greek philosophy, he went beyond his predecessors in spite of large-scale dependence upon them. He made Plato’s political philosophy, modified by Aristotle, his own and considered it valid for the Islamic state as well. Consequently, he applied Platonic ideas to the contemporary Almoravid and Almohad states in a sustained critique in Platonic terms, convinced that if the philosopher cannot rule, he must try to influence policy in the direction of the ideal state. For Plato’s ideal state is the best after the ideal state of Islam based on and centred in the Shari’ah as the ideal constitution. Thus, he regrets the position of women in Islam compared with their civic equality in Plato’s Republic. That women are used only for childbearing and the rearing of offspring is detrimental to the economy and responsible for the poverty of the state. This is most unorthodox.


Of greater importance is his acceptance of Plato’s idea of the transformation and deterioration of the ideal, perfect state into the four imperfect states. Mu’awiyah I, who in Muslim tradition perverted the ideal state of the first four caliphs into a dynastic power state, is viewed by Averroës in the Platonic sense as having turned the ideal state into a timocracy--a government based on love of honour. Similarly, the Almoravid and Almohad states are shown to have deteriorated from a state that resembled the original perfect Shari’ah state into timocracy, oligarchy, democracy, and tyranny. Averroës here combines Islamic notions with Platonic concepts. In the same vein he likens the false philosophers of his time, and especially the mutakallimun, to Plato’s sophists. In declaring them a real danger to the purity of Islam and to the security of the state, he appeals to the ruling power to forbid dialectical theologians to explain their beliefs and convictions to the masses, thus confusing them and causing heresy, schism, and unbelief. The study of The Republic and the Nicomachean Ethics enabled the falasifah to see more clearly the political character and content of the Shari’ah in the context of the classical Muslim theory of the religious and political unity of Islam.


Leaning heavily on the treatment of Plato’s political philosophy by al- Farabi, a 10th-century philosopher, Averroës looks at The Republic with the eyes of Aristotle, whose Nicomachean Ethics constitutes for Averroës the first, theoretical part of political science. He is, therefore, only interested in Plato’s theoretical statements. Thus he concentrates on a detailed commentary on Books II-IX of The Republic and ignores Plato’s dialectical statements and especially his tales and myths, principally the myth of Er. He explains Plato, whose Laws and Politikos he also knows and uses, with the help, and in the light, of Aristotle’s Analytica posteriora, De anima, Physica, and Nicomachean Ethics. Naturally, Greek pagan ideas and institutions are replaced by Islamic ones. Thus Plato’s criticism of poetry (Homer) is applied to Arab pre-Islamic poetry, which he condemns.


Averroës sees much common ground between the Shari’ah and Plato’s general laws (interpreted with the help of Aristotle), notwithstanding his conviction that the Shari’ah is superior to the nomos. He accepts al-Farabi’s equation of Plato’s philosopher-king with the Islamic imam, or leader and lawgiver, but leaves it open whether the ideal ruler must also be a prophet. The reason for this may well be that, as a sincere Muslim, Averroës holds that Muhammad was “the seal of the prophets” who promulgated the divinely revealed Shari’ah once and for all. Moreover, Averroës exempts Muhammad from the general run of prophets, thus clearly rejecting the psychological explanation of prophecy through the theory of emanation adopted by the other falasifah. No trace of this theory can be discovered in Averroës’ writings, just as his theory of the intellect is strictly and purely Aristotelian and free from the theory of emanation. In conclusion, it may be reiterated that the unity of outlook in Averroës’ religious-philosophical writings and his commentary on The Republic gives his political philosophy a distinctly Islamic character and tone, thereby adding to his significance as a religious philosopher.


(E. I. J. Rosenthal)




·         Léon Gauthier, Ibn Rochd (Averroès) (1948), a balanced overall picture of his life and works, and La Théorie d’lbn Rochd (Averroès) sur les rapports de la religion et de la philosophie (1909), an indispensable work that was the basis for the author’s later study cited above;

·         G.F. Hourani, (Averroës) On the Harmony of Religion and Philosophy (Eng. trans. 1961);

·         E.I.J. Rosenthal, “The Place of Politics in the Philosophy of Ibn Rushd,” Bulletin of the School of Oriental and African Studies, vol. 15, no. 2 (1953), a discussion of Averroës’ political philosophy within the context of his life and writings reprinted in Studia Semitica et Orientalia II (1971), Averroës’ Commentary on Plato’s Republic, 3rd ed. (1969), Hebrew text, Eng. trans. and notes, giving Averroës’ Greek and Arabic sources, and “Ibn Rushd: The Consummation,” in Political Thought in Medieval Islam, 3rd ed., ch. 9 (1968);

·         S. van den Bergh, Averroës’ Tahafut al-Tahafut: The Incoherence of the Incoherence, 2 vol. (1954), Eng. trans. with important notes tracing Averroës’ sources, especially Aristotle.



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