Abu Rayhan Muhammad ibn Ahmad al-Biruni, widely known as al-Biruni (c. 973 – c. 1050), was a Khwarazmian Iranic scholar and polymath active during the Islamic Golden Age. He is frequently credited with pioneering roles, including the "Father of Comparative Religion," the "Father of modern geodesy," the founder of Indology, and the first anthropologist.
Al-Biruni possessed extensive knowledge in physics, mathematics, astronomy, and natural sciences, in addition to excelling as a historian, chronologist, and linguist. His comprehensive studies encompassed nearly all contemporary scientific disciplines, and his diligent research across numerous fields of knowledge garnered significant recognition and support. His scholarly endeavors were financially supported by royalty and other influential societal figures, who frequently commissioned him for specific projects. While a prominent intellectual himself, al-Biruni drew inspiration from international scholars, notably the Greeks, particularly in his philosophical pursuits. As a proficient linguist, he was fluent in Khwarezmian, Persian, Arabic, and Sanskrit, and also possessed knowledge of Greek, Hebrew, and Syriac. A significant portion of his life was spent in Ghazni, which served as the Ghaznavid capital in what is now central-eastern Afghanistan. In 1017, he journeyed to the Indian subcontinent, where he explored the Hindu faith and subsequently authored a comprehensive treatise on Indian culture titled Tārīkh al-Hind ("The History of India"). Remarkably impartial for his era, his writings on the customs and beliefs of diverse nations demonstrated exceptional scholarly objectivity, leading to his appellation as al-Ustadh ("The Master") in acknowledgment of his profound insights into early 11th-century India.
Nomenclature
The appellation 'Al-Biruni' originates from the Persian term bērūn or bīrūn, signifying 'outskirts'. This etymology reflects his birthplace in a peripheral area of Kath, the former capital of the Afrighid kingdom of Khwarazm. The contemporary city, now known as Beruniy, is situated within the autonomous republic of Karakalpakstan in northwestern Uzbekistan.
His name was predominantly Latinized as Alberonius.
Biographical Overview
Al-Biruni's initial twenty-five years were spent in Khwarezm, where he pursued extensive studies in Islamic jurisprudence, theology, grammar, mathematics, astronomy, medicine, and philosophy. His intellectual pursuits extended across physics and numerous other scientific disciplines. The Iranian Khwarezmian language, Al-Biruni's native tongue, persisted for several centuries post-Islam until the region's Turkification, indicating the resilience of ancient Khwarezmian culture. It is improbable that a figure of Al-Biruni's intellectual stature, possessing such a vast repository of knowledge, could have emerged from a cultural void. He held sympathies for the Afrighids, a dynasty supplanted by the rival Ma'munids in 995. Subsequently, he departed his homeland for Bukhara, then governed by the Samanid ruler Mansur II, son of Nuh II. During this period, he engaged in correspondence with Avicenna, and records of their scholarly exchanges remain extant.
In 998, Al-Biruni traveled to the court of Qabus (r. 977–981, 997–1012), the Ziyarid amir of Tabaristan. It was there that he composed his seminal work, al-Athar al-Baqqiya 'an al-Qorun al-Khaliyya ('The remaining traces of past centuries,' also rendered as 'Chronology of ancient nations' or 'Vestiges of the Past'), focusing on historical and scientific chronology. This work was likely completed around 1000 CE, with subsequent revisions by the author. He also visited the court of the Bavandid ruler Al-Marzuban. Acknowledging the definitive overthrow of the Afrighids by the Ma'munids, he reconciled with the latter, who then governed Khwarezm. The Ma'munid court at Gorganj, also located in Khwarezm, was becoming renowned for attracting distinguished scientists.
In 1017, Mahmud of Ghazni conquered Rey, leading to the relocation of many scholars, including Al-Biruni, to Ghazni, the capital of the Ghaznavid dynasty. Al-Biruni was appointed court astrologer and accompanied Mahmud during his campaigns into India, residing there for several years. He was 44 years old at the commencement of these expeditions with Mahmud of Ghazni. During this period, Al-Biruni developed a profound understanding of Indian culture and society. His comprehensive study of India was completed around 1030. Beyond his ethnographic writings, Al-Biruni also pursued scientific investigations during these travels. He devised a method to ascertain the sun's altitude and constructed a provisional quadrant for this measurement. Al-Biruni significantly advanced his research through his extensive travels across the Indian subcontinent.
Astronomy
Al-Bīrūnī authored 146 books, 95 of which focused on astronomy, mathematics, and related disciplines such as mathematical geography. During the Islamic Golden Age, the Abbasid Caliphs fostered astronomical research due to its dual scientific and religious importance. In Islam, worship and prayer necessitate accurate knowledge of sacred locations' directions, which can only be precisely determined using astronomical data.
Al-Biruni employed diverse methodologies in his research, adapting them to the specific field of inquiry.
Al-Biruni's primary work on astrology functions predominantly as an astronomical and mathematical text. He states: "I have commenced with Geometry and advanced to Arithmetic and the Science of Numbers, subsequently to the structure of the Universe, and ultimately to Judicial Astrology [sic], as no individual deserving the designation of Astrologer [sic] can be unfamiliar with these four sciences." In these foundational chapters, he establishes the basis for the final section, which critically evaluates astrological prognostication. In a subsequent work, he penned a refutation of astrology, distinguishing it from the legitimate science of astronomy, which he wholeheartedly supported. Some scholars suggest his reasons for refuting astrology were rooted in its reliance on pseudoscientific rather than empirical methods, as well as a conflict between astrological views and the doctrines of orthodox Sunni Islam theologians.
Al-Biruni composed a comprehensive commentary on Indian astronomy within the Taḥqīq mā li-l-Hind, which largely comprised a translation of Aryabhatta's work. In this text, he claims to have resolved the question of Earth's rotation in a now-lost astronomical treatise, his Miftah-ilm-alhai'a ("Key to Astronomy"):
"[T]he Earth's rotation in no way diminishes the value of astronomy, as all astronomical phenomena can be equally well explained by this theory as by the alternative. However, other reasons render it impossible. This question proves exceedingly difficult to resolve. The most eminent astronomers, both ancient and contemporary, have thoroughly investigated the Earth's motion and sought to refute it. We, too, have authored a book on this subject, titled Miftah-ilm-alhai'a (Key to Astronomy), in which we believe we have surpassed our predecessors, if not in expression, then certainly in substance."
In his seminal astronomical treatise, the Mas'ud Canon, Biruni observed that the Sun's apogee (its highest point in the heavens) was mobile rather than fixed, a finding that contradicted Ptolemy. He also authored a treatise on the astrolabe, detailing its application for timekeeping and its function as a quadrant for surveying. A specific diagram depicting an eight-geared mechanism is considered a precursor to subsequent Muslim astrolabes and clocks. More recently, Dunthorne utilized Biruni's eclipse data in 1749 to ascertain the Moon's acceleration, and his records of equinox times and eclipses contributed to a study on Earth's past rotation.
Refutation of the Eternal Universe
Al-Biruni, akin to later adherents of the Ash'ari school such as al-Ghazali, is renowned for vehemently defending the mainstream Sunni position that the universe had a beginning. He was a staunch proponent of *creatio ex nihilo*, specifically refuting the philosopher Ibn Sina through extensive correspondence. Al-Biruni articulated:
"Furthermore, other individuals maintain the erroneous belief that time possesses no absolute beginning."
Al-Biruni further contended that Aristotle, whose arguments Avicenna employed, contradicted himself by asserting that the universe and matter had a beginning while simultaneously maintaining the concept of matter's pre-eternity. In his letters to Avicenna, Al-Biruni presented Aristotle's argument regarding a change in the creator. He further reasoned that positing a change in the creator would imply a corresponding change in the effect (meaning the universe undergoes change), and that the universe's emergence from non-existence constitutes such a change. Therefore, he argued that asserting no change (and thus no beginning) would lead to Aristotle's negation of the creator. Al-Biruni expressed pride in adhering to religious textual evidence, uninfluenced by Greek philosophers such as Aristotle.
Physics
Al-Biruni was instrumental in introducing the scientific method to medieval mechanics. He devised experimental methodologies for density determination, employing a specialized hydrostatic balance. This hydrostatic balance method proved highly accurate, enabling him to quantify the densities of diverse materials, such as precious metals, gemstones, and even atmospheric gases. Furthermore, he applied an empirical approach to ascertain Earth's radius, involving the measurement of the horizon's angle of elevation from a mountain summit and its subsequent comparison with the angle observed from an adjacent plain.
Beyond his innovation of the hydrostatic balance, Al-Biruni produced comprehensive treatises on density, encompassing its various classifications and measurement techniques. His contributions to this field significantly impacted subsequent scholarship.
Geography and geodesy
Bīrūnī innovated a method for calculating Earth's radius through observations of mountain heights. This procedure was executed at Nandana, located in present-day Pind Dadan Khan, Pakistan. His methodology involved trigonometric calculations, utilizing measurements of a hill's elevation and the horizon's dip angle from its summit. Sparavigna notes that his computed Earth radius of 3928.77 miles exceeded the actual mean radius of 3847.80 miles by 2%. The estimate, expressed as 12,803,337 cubits, implies that its precision relative to contemporary values is contingent upon the cubit's conversion factor. The precise length of a cubit remains ambiguous; an 18-inch cubit would yield an estimate of 3,600 miles, while a 22-inch cubit would result in 4,200 miles. A notable limitation of this methodology was Al-Biruni's lack of awareness regarding atmospheric refraction, for which he made no compensatory adjustments. Although he employed a dip angle of 34 arc minutes, refraction commonly modifies the observed dip angle by approximately one-sixth, thereby limiting his calculation's accuracy to within about 20% of the actual value.
Within his 1037 work, Codex Masudicus, Al-Biruni posited the existence of a continental landmass situated across the immense ocean separating Asia and Europe, now identified as the Americas. His argument was predicated on his precise calculations of Earth's circumference and the extent of Afro-Eurasia, which he determined constituted merely two-fifths of the global circumference. He reasoned that the geological forces responsible for Eurasia's formation would inevitably have produced landforms within the expansive ocean between Asia and Europe. Furthermore, he hypothesized that a portion of this undiscovered landmass would fall within habitable latitudes, thus suggesting its potential for human habitation.
Pharmacology and mineralogy
Biruni authored a pharmacopoeia titled Kitab al-saydala fi al-tibb, which translates to 'Book on the Pharmacopoeia of Medicine'. This compendium enumerates synonyms for pharmaceutical substances across various languages, including Syriac, Persian, Greek, Baluchi, Afghan, Kurdish, and several Indian dialects.
He employed a hydrostatic balance to ascertain the density and purity of metals and gemstones. His gem classification system prioritized fundamental physical attributes, such as specific gravity and hardness, diverging from the contemporary custom of categorizing them by color.
History and chronology
Biruni's principal treatise on political history, titled Kitāb al-musāmara fī aḵbār Ḵᵛārazm ('Book of nightly conversation concerning the affairs of Ḵᵛārazm'), is presently accessible solely through excerpts cited in Bayhaqī's Tārīkh-e Masʿūdī. Beyond this, diverse analyses of historical occurrences and methodological approaches appear in conjunction with royal genealogies within his al-Āthār al-bāqiya and the Qānūn, as well as in other sections of the Āthār, in his work on India, and dispersed across his broader corpus. Al-Biruni's work, Chronology of Ancient Nations, aimed to precisely delineate the durations of distinct historical epochs.
History of religions
Al-Biruni is widely recognized as a preeminent Muslim scholar in the history of religions. He is credited with pioneering the field of comparative religion through his examination of various belief systems, including Zoroastrianism, Judaism, Hinduism, Christianity, Buddhism, and Islam. While he asserted the supremacy of Islam, stating, "We have here given an account of these things in order that the reader may learn by the comparative treatment of the subject how much superior the institutions of Islam are, and how more plainly this contrast brings out all customs and usages, differing from those of Islam, in their essential foulness," he also occasionally expressed admiration for other cultures. He frequently cited sacred texts from other religions to support his conclusions, aiming to comprehend these systems on their own merits rather than to discredit them. His fundamental premise was that all cultures are interconnected, sharing a common human origin. As such, Al-Biruni contended that a shared human element underlies every culture, establishing a distant kinship among all cultures, regardless of their apparent differences.
Al-Biruni categorized Hindus into two distinct groups: the educated and the uneducated. He characterized the educated as monotheistic, adhering to the belief in a singular, eternal, and omnipotent God, and rejecting all forms of idol worship. While acknowledging that uneducated Hindus engaged in the worship of multiple idols, he also noted that certain Muslim sects, such as the Jabriyah, had adopted anthropomorphic interpretations of God.
Anthropology
Al-Biruni documented the populations, traditions, and religious practices of the Indian subcontinent. Akbar S. Ahmed posits that Al-Biruni, much like contemporary anthropologists, conducted extensive participant observation within specific communities, acquired their languages, and analyzed their foundational texts. He then presented his discoveries with impartiality and neutrality, employing cross-cultural comparative methods. While Akbar S. Ahmed concluded that Al-Biruni could be regarded as the inaugural anthropologist, other scholars contend that his work does not align with the conventional definition of anthropology.
Indology
Al-Biruni's reputation as an Indologist is predominantly based on two significant texts. He authored an encyclopedic treatise on India titled Taḥqīq mā li-l-Hind min maqūlah maqbūlah fī al-ʿaql aw mardhūlah, which has been translated as Verifying All That the Indians Recount, the Reasonable and the Unreasonable or The book confirming what pertains to India, whether rational or despicable. This work comprehensively examined almost every facet of Indian existence. During his travels across India, Al-Biruni prioritized documenting the civilian and academic dimensions of Hindu life, focusing on culture, science, and religion, rather than military or political history. He investigated religion within its extensive cultural framework and articulated his aims with straightforward clarity. Additionally, he translated the Yoga Sutras of the Indian sage Patanjali under the title Tarjamat ketāb Bātanjalī fi’l-ḵalāṣ men al-ertebāk.
I will not present the arguments of our adversaries to refute those I deem incorrect. My work serves solely as a straightforward historical account of facts. I intend to lay before the reader the theories of the Hindus precisely as they exist, and in conjunction, I will reference analogous Greek theories to illustrate the connections between them.
Biruni's analysis included an examination of the reasons behind the animosity many Hindus harbored towards Muslims. Early in his treatise, Biruni observed the difficulties Muslims encountered in assimilating Hindu knowledge and culture. He posited that Hinduism and Islam were fundamentally distinct religious systems. Furthermore, Biruni contended that 11th-century Hindus in India had endured successive destructive assaults on numerous cities, and Islamic forces had transported many Hindu captives to Persia. This, he argued, fostered a pervasive suspicion among Hindus towards all foreign groups, extending beyond Muslims. Consequently, Hindus perceived Muslims as violent and ritually impure, leading to an unwillingness to engage in shared activities. Gradually, Biruni gained the acceptance of Hindu scholars. He amassed texts and collaborated with these scholars, achieving fluency in Sanskrit and subsequently discovering and translating into Arabic the mathematical, scientific, medical, astronomical, and artistic knowledge prevalent in 11th-century India. Biruni was particularly influenced by Indian scholars who advocated for a spherical Earth, asserting that this form uniquely accounted for variations in daylight hours across latitudes, seasonal changes, and Earth's orbital relationships with the Moon and stars. Concurrently, Biruni expressed criticism of Indian scribes, whom he believed introduced inaccuracies into documents during the transcription of older manuscripts. He also critiqued certain Hindu practices and omissions, noting, for instance, a perceived lack of historical and religious inquiry.
Among the specific facets of Hindu life Biruni investigated was the Hindu calendar system. His scholarly work on this subject demonstrated remarkable determination, focus, and an exemplary approach to in-depth research. Biruni devised a methodology for converting dates from the Hindu calendar to those of the three predominant calendars in contemporary Islamic regions: the Greek, the Arab/Muslim, and the Persian. Furthermore, he integrated astronomical principles into his theoretical framework, which involved intricate mathematical equations and scientific computations enabling the conversion of dates and years across these diverse calendrical systems.
Biruni's work transcends mere chronicles of warfare, prioritizing the exploration of social culture. The treatise encompasses extensive research into various aspects of Indian culture, providing detailed descriptions of its traditions and customs. Despite his stated intention to avoid political and military history, Biruni meticulously documented significant dates and identified the precise locations of major battles. He also recounted narratives of Indian rulers, detailing their benevolent governance and actions undertaken for the nation's welfare. These accounts are concise, primarily listing rulers without specifying their proper names, and deliberately omit extensive descriptions of individual deeds during their reigns, consistent with Biruni's objective to minimize focus on political histories. Furthermore, Biruni included a geographical description of India in his writings. He meticulously recorded various bodies of water and other natural features. These geographical descriptions remain valuable for contemporary historians, who utilize Biruni's scholarship to pinpoint specific locations in present-day India. Scholars can identify correspondences while also observing that some areas appear to have vanished or been supplanted by new urban centers. The successful identification of various forts and landmarks underscores the enduring utility of Biruni's contributions to modern historical and archaeological research.
Biruni's dispassionate portrayal of Hinduism was exceptionally noteworthy for its era. He asserted complete objectivity in his scholarly endeavors, maintaining the impartiality expected of a rigorous historian. Biruni meticulously recorded observations about India as they occurred. However, he acknowledged that certain information provided by local inhabitants might lack absolute accuracy, though he strived for utmost veracity in his documentation. Eduard Sachau characterized this approach as "a magic island of quiet, impartial research in the midst of a world of clashing swords, burning towns, and plundered temples." The poetic nature of Biruni's prose might, for contemporary scholars, somewhat detract from its historical utility. The absence of detailed accounts regarding military conflicts and political dynamics results in a significant gap in the historical record. Nevertheless, Biruni's scholarship has frequently served as a valuable resource for corroborating historical details in other texts whose factual accuracy or validity was uncertain.
Religious Views
As a Muslim critical thinker, Biruni integrated 'aql (reason) and naql (revelation) within his scholarly methodology.
Al-Biruni did not explicitly declare adherence to either Sunni or Shia branches of Islam, identifying solely as a Muslim. Historian Walter J. Fischel described Al-Biruni as "the greatest Muslim Hebraist."
Yasir Qadhi noted Al-Biruni's "not pro-Hadith" stance and his "sceptical of the Hadith" disposition. Al-Biruni dismissed hadiths that conflicted with scientific principles. For instance, his refutation of the Ashura fasting hadith, documented in Sahih al-Bukhari, stemmed from historical and scientific analysis, demonstrating a critical methodology towards hadith when discrepancies with verifiable evidence were identified. Al-Biruni employed astronomical and historical computations to contend that the 10th of Muharram (Ashura) could not have coincided with the Jewish Day of Atonement (Yom Kippur, 10th of Tishri) during the second year of the Hijra, contrary to certain hadith accounts. He concluded that the dates were incongruent, thereby invalidating the hadith's premise that Prophet Muhammad fasted in emulation of Jewish practice, deeming it historically and astronomically unsound.
Al-Biruni recognized Abu Bakr, Umar ibn al-Khattab, Uthman ibn Affan, Ali ibn Abi Talib, and Hasan ibn Ali as "caliphs." Conversely, he categorized the Umayyads as "kings" and the Abbasids as "imams." He also championed the Mu'tazilites, refuting malicious distortions of their theological principles. Furthermore, Al-Biruni expressed criticism of Sufism.
Al-Biruni demonstrated an unwavering resolve in both rejecting tenets deemed unacceptable to Muslims and denouncing unjust critiques of other religions, including Christianity. While he critiqued the concept of the Trinity, he posited that the Tawrat and Injeel employed the terms "father" and "son" in both literal and metaphorical contexts.
Works
The majority of Al-Biruni's scholarly output is in Arabic, although he reportedly composed the Kitab al-Tafhim in both Persian and Arabic, demonstrating his proficiency in both languages. Biruni's personal bibliography, compiled up to his 65th lunar/63rd solar year (corresponding to the end of 427 AH/1036 CE), enumerates 103 titles. These works are categorized into twelve distinct fields: astronomy, mathematical geography, mathematics, astrological aspects and transits, astronomical instruments, chronology, comets, an unspecified category, astrology, anecdotes, religion, and texts no longer in his possession.
Selection of Extant Works
- Taḥqīq mā li-l-Hind (A Critical Study of What India Says, Whether Accepted by Reason or Refused; تحقيق ما للهند من مقولة معقولة في العقل أو مرذولة), commonly known as Kitāb al-Hind (The Book on India). English renditions are titled Indica or Alberuni's India. This seminal work constitutes a comprehensive compendium on Indian religion and philosophy.
- Kitab al-tafhim li-awa’il sina‘at al-tanjim (Book of Instruction in the Elements of the Art of Astrology), written in Persian.
- The Remaining Signs of Past Centuries (الآثار الباقية عن القرون الخالية), a comparative analysis of calendars across various cultures and civilizations. This work, which includes dedicated chapters on Christian cults, encompasses extensive mathematical, astronomical, and historical data.
- The Mas'udi Law (قانون مسعودي), an encyclopedic treatise covering astronomy, geography, and engineering. This volume was dedicated to Mas'ud, the son of the Ghaznavid sultan Mahmud of Ghazni.
- Understanding Astrology (التفهيم لصناعة التنجيم) is a book structured in a question-and-answer format, covering mathematics and astronomy, written in both Arabic and Persian.
- Pharmacy constitutes a treatise dedicated to the study of drugs and medicinal substances.
- Gems (الجماهر في معرفة الجواهر) is a geological manual that details minerals and precious stones, dedicated to Mawdud, son of Mas'ud.
- A historical account chronicling the lives of Mahmud of Ghazni and his father.
- A historical narrative concerning Khawarezm.
- Kitab al-Āthār al-Bāqīyah ‘an al-Qurūn al-Khālīyah.
- Risālah li-al-Bīrūnī (Epître de Berūnī).
A work composed in Persian.
While Biruni primarily authored his works in Arabic, the predominant scientific language of his era, al-Tafhim stands as a significant early scientific text in Persian. It serves as a valuable resource for Persian prose and lexicography, comprehensively and expertly addressing the Quadrivium.
Legacy
Subsequent to Al-Biruni's demise, his scholarly contributions remained largely unutilized and unreferenced by contemporary academics. However, centuries later, his treatises concerning India garnered renewed attention, particularly from the British Raj.
In recognition of his contributions, the lunar crater Al-Biruni and the asteroid 9936 Al-Biruni bear his name. Additionally, Biruni Island in Antarctica is designated in honor of al-Biruni. In Iran, surveying engineers commemorate al-Biruni's birthday with celebrations.
In June 2009, Iran presented a pavilion to the United Nations Office in Vienna, situated within the central Memorial Plaza of the Vienna International Center. This structure, known as the Scholars Pavilion, showcases statues of four distinguished Iranian scholars: Avicenna, Abu Rayhan Biruni, Zakariya Razi (Rhazes), and Omar Khayyam.
In Popular Culture
A biographical film detailing the life of Al-Biruni, titled Abu Raykhan Beruni, premiered in the Soviet Union in 1974.
Irrfan Khan depicted Al-Biruni in the 1988 Doordarshan historical drama Bharat Ek Khoj. More recently, Cüneyt Uzunlar has portrayed him in the Turkish television series Alparslan: Great Seljuk, broadcast on TRT 1.
Notes
References
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- The works of Abu Rayhan (al-)Biruni – manuscripts, critical editions, and translations compiled by Jan Hogendijk
- the al-Qanūn al-Masʿūdī Archived 26 March 2023 at the Wayback Machine
- the Kitāb istī‘āb al-wujūh al-mumkinah fī ṣan‘at al-asṭurlāb Archived 14 March 2023 at the Wayback Machine