Islamic Golden Age
The Islamic Golden Age starts with Abbasid historical period beginning in the mid 8th century lasting until the Mongol conquest of Baghdad in 1258. The Islamic Golden Age was inaugurated by the middle of the 8th century by the ascension of the Abbasid Caliphate and the transfer of the capital from Damascus to Baghdad. The Abbasids were influenced by the Qur'anic injunctions and hadith such as "the ink of a scholar is more holy than the blood of a martyr" (also see ijtihad) that stressed the value of knowledge. The rise of Islam was instrumental in uniting the warring Arab tribes into a powerful empire. The Abbasids claimed to belong to the same tribe to which the Prophet Muhammad belonged, and were for that reason considered holy. During this period the Arab world became an intellectual center for science, philosophy, medicine and education; the Abbasids championed the cause of knowledge and established the House of Wisdom (Bait-ul-Hikmat) at Baghdad, where both Muslim and non-Muslim scholars sought to translate and gather all the world's knowledge into Arabic. The Arabs showed a strong interest in assimilating the scientific knowledge of the civilizations they had overrun. Many classic works of antiquity that might otherwise have been lost were translated into Arabic and Persian and later in turn translated into Turkish, Hebrew and Latin. During this period the Arab world was a collection of cultures which put together, synthesized and significantly advanced the knowledge gained from the ancient Roman, Chinese, Indian, Persian, Egyptian, Greek, Byzantine and Phoenician civilizations. The decimal system travelled from India to Arabia during this time and in 9th century it was popularized in the region by the Persian mathematician al-Khwarizmi. In 10th/11th century Fatimid made a lot of contribution as described below making their presence felt. Later in 12th century a monk Abelard introduced it in Europe. They also began the use of a first form of algebra (without numerical exponents) in order to solve complex mathematical problems.
- 1 Causes
- 2 Philosophy
- 3 Science
- 4 Institutions
- 5 Commerce and travel
- 6 Culture
- 7 Decline
- 8 Opposing view
- 9 See also
- 10 Notes
- 11 References
- 12 Further reading
- 13 External links
With a new, easier writing system and the introduction of paper, information was democratized to the extent that, probably for the first time in history, it became possible to make a living from simply writing and selling books. The use of paper spread from China into Muslim regions in the eighth century CE, arriving in Spain (and then the rest of Europe) in the 10th century CE. It was easier to manufacture than parchment, less likely to crack than papyrus, and could absorb ink, making it difficult to erase and ideal for keeping records. Islamic paper makers devised assembly-line methods of hand-copying manuscripts to turn out editions far larger than any available in Europe for centuries. It was from these countries that the rest of the world learned to make paper from linen.
The government heavily patronized scholars. The money spent on the Translation Movement for some translations is estimated to be equivalent to about twice the annual research budget of the United Kingdom’s Medical Research Council. The best scholars and notable translators, such as Hunayn ibn Ishaq, had salaries that are estimated to be the equivalent of professional athletes today.
Eastern Christian scholars (including ibn Ishaq) were important in preserving ancient Greek texts. During the 4th through the 7th centuries, scholarly work in the Syriac and Greek languages was either newly initiated, or carried on from the Hellenistic period. Centers of learning and of transmission of classical wisdom included colleges such as the School of Nisibis and later the School of Edessa, and the renowned hospital and medical academy of Jundishapur; libraries included the Library of Alexandria and the Imperial Library of Constantinople; and other centers of translation and learning functioned at Merv, Salonika, Nishapur and Ctesiphon situated just south of what was later to become Baghdad. The House of Wisdom was a library, translation institute and academy established in Abbasid-era Baghdad, Iraq. 
Ibn Rushd and Ibn Sina played a major role in saving the works of Aristotle, whose ideas came to dominate the non-religious thought of the Christian and Muslim worlds. They would also absorb ideas from China, and India, adding to them tremendous knowledge from their own studies. Ibn Sina and other speculative thinkers such as al-Kindi and al-Farabi combined Aristotelianism and Neoplatonism with other ideas introduced through Islam. Avicenna argued his famous "Floating Man" thought experiment, concerning self-awareness, where a man prevented of sense experience by being blindfolded and free falling would still be aware of his existence.
Arabic philosophic literature was translated into Latin, and Ladino, contributing to the development of modern European philosophy. The Islamic golden age also allowed for the flourishing of non-Muslim philosophers. The Jewish philosopher Moses Maimonides who lived in Andalusia is an example.
Many notable Islamic and non-Islamic scientists lived and practiced during the Arab Golden Age. Among the achievements of Muslim scholars during this period were the development of trigonometry into its modern form (simplifying its practical application to calculate the phases of the moon), advances in optics, and advances in astronomy.
Christians (particularly Nestorian Christians) contributed to the Arab Islamic Civilization during the Ummayads and the Abbasids by translating works of Greek philosophers to Syriac and afterwards to Arabic. Nestorians played a prominent role in the formation of Arab culture, with the Jundishapur school being prominent in the late Sassanid, Umayyad and early Abbasid periods. Notably, eight generations of the Nestorian Bukhtishu family served as private doctors to caliphs and sultans between the eighth and eleventh centuries.
Ibn Al-Haytham (Alhazen) was significant in the History of scientific method, particularly in his approach to experimentation, and has been referred to by his modern biographer Bradley Steffens and others  as the "world’s first true scientist".
In calculus, Alhazen discovered the sum formula for the fourth power, using a method readily generalizable to determine the sum for any integral power. He used this to find the volume of a paraboloid. He could find the integral formula for any polynomial without having developed a general formula.
In geometry, Medieval Islamic art from the 15th century intuitively echoed principles of quasicrytalline geometry which were discovered 500 years later. The art uses symmetric polygonal shapes to create patterns that, without leaving gaps, can continue indefinitely without repeating its pattern, in a way which can be directly compared to what are now considered quasi-crystals. It was previously thought Islamic design was done with straightedge rulers and compasses, but Lu and Steinhart now argue that the patterns were created by tessellating a small number of different tiles with complex shapes, evolving into what would now be described as quasi-periodic shapes by the fifteenth century. The Swedish Academy, which granted Dan Shechtman the Nobel Prize in Chemistry for his discovery of quasicrystals in molecular structures, stated, "Aperiodic mosaics, such as those found in the medieval Islamic mosaics of the Alhambra Palace in Spain and the Darb-i Imam Shrine in Iran, have helped scientists understand what quasicrystals look like at the atomic level".
In trigonometry, Ibn Muʿādh al-Jayyānī introduced the general Law of sines in his The book of unknown arcs of a sphere in 11th century. This formula relates the lengths of the sides of an arbitrary triangle (not just limited to right triangles) to the sines of its angles.
In a discussion broadcast by ABC the paleontologist and practicing Muslim Gary Dargan said that al-Jāḥiẓ had made observations that described evolution: "Animals engage in a struggle for existence; for resources, to avoid being eaten and to breed. Environmental factors influence organisms to develop new characteristics to ensure survival, thus transforming into new species. Animals that survive to breed can pass on their successful characteristics to offspring."
Medicine was a central part of medieval Islamic culture. Responding to circumstances of time and place, Islamic physicians and scholars developed a large and complex medical literature exploring and synthesizing the theory and practice of medicine. (from the National Library of Medicine digital archives)
Islamic medicine was built on tradition, chiefly the theoretical and practical knowledge developed in India, Greece, Persia, and Rome. For Islamic scholars, Galen, Mankah, Sustura, and Hippocrates were pre-eminent authorities. Islamic scholars translated their voluminous writings from Syriac, Greek and Sanskrit into Arabic and then produced new medical knowledge based on those texts. In order to make the Greek tradition more accessible, understandable, and teachable, Islamic scholars ordered and made more systematic the vast and sometimes inconsistent Greco-Roman medical knowledge by writing encyclopaedias and summaries. (from the National Library of Medicine digital archives)
Pagan Latin and Greek learning was viewed suspiciously in Christian early medieval Europe, and it was through 12th century Arabic translations that medieval Europe rediscovered Hellenic medicine, including the works of Galen and Hippocrates. Of equal if not of greater influence in Western Europe were systematic and comprehensive works such as Avicenna's The Canon of Medicine, which were translated into Latin and then disseminated in manuscript and printed form throughout Europe. During the fifteenth and sixteenth centuries alone, The Canon of Medicine was published more than thirty-five times. (from the National Library of Medicine digital archives)
Hospitals in this era were the first to require medical diplomas to license doctors. In the medieval Islamic world, hospitals were built in most major cities; in Cairo for example, the Qalawun hospital had a staff that included physicians, pharmacists, and nurses.
Medical facilities traditionally closed each night, but by the 10th century laws were passed to keep hospitals open 24 hours a day and hospitals were forbidden to turn away patients who were unable to pay. Eventually, charitable foundations called waqfs were formed to support hospitals, as well as schools. This money supported free medical care for all citizens.
Commerce and travel
Apart from the Nile, Tigris and Euphrates, navigable rivers were uncommon, so transport by sea was very important. Navigational sciences were highly developed, making use of a rudimentary sextant (known as a kamal). When combined with detailed maps of the period, sailors were able to sail across oceans rather than skirt along the coast. Muslim sailors were also responsible for reintroducing large three masted merchant vessels to the Mediterranean. The name caravel may derive from an earlier Arab boat known as the qārib.
The golden age of Islamic (and/or Muslim) art lasted from 750 to the 16th century, when ceramics (especially lusterware), glass, metalwork, textiles, illuminated manuscripts, and woodwork flourished. Manuscript illumination became an important and greatly respected art, and portrait miniature painting flourished in Persia. Calligraphy, an essential aspect of written Arabic, developed in manuscripts and architectural decoration. Calligraphy was developed because the Islamic religion did not allow paintings of human-beings.
The Great Mosque of Kairouan (in Tunisia), the ancestor of all the mosques in the western Islamic world, is one of the best preserved and most significant examples of early great mosques. Founded in 670, it dates in its present form largely from the 9th century. The Great Mosque of Kairouan is constituted of a three-tiered square minaret, a large courtyard surrounded by colonnaded porticos and a huge hypostyle prayer hall covered on its axis by two cupolas.
The beginning of construction of the Great Mosque at Cordoba in 785 marking the beginning of Islamic architecture in Spain and Northern Africa. The mosque is noted for its striking interior arches. Moorish architecture reached its peak with the construction of the Alhambra, the magnificent palace/fortress of Granada, with its open and breezy interior spaces adorned in red, blue, and gold. The walls are decorated with stylized foliage motifs, Arabic inscriptions, and arabesque design work, with walls covered in glazed tiles.
Another distinctive sub-style is the architecture of the Mughal Empire in India in the 16th century. Blending Islamic and Hindu elements, the emperor Akbar constructed the royal city of Fatehpur Sikri, located 26 miles west of Agra, in the late 1500s.
There is little agreement on the precise causes of the decline, but in addition to invasion by the Mongols and crusaders and the destruction of libraries and madrasahs, it has also been suggested that political mismanagement and the stifling of ijtihad (independent reasoning) in the 12th century in favor of institutionalised taqleed (imitation) thinking played a part. Ahmad Y Hassan has rejected the thesis that lack of creative thinking was a cause, arguing that science was always kept separate from religious argument; he instead analyses the decline in terms of economic and political factors, drawing on the work of the 14th Century writer Ibn Khaldun.
The Crusades put the Islamic world under pressure by invasion in the 11th and 12th centuries, but a new and far greater threat came from the East during the 13th century: in 1206, Genghis Khan established a powerful dynasty among the Mongols of central Asia. During the 13th century, this Mongol Empire conquered most of the Eurasian land mass, including both China in the east and much of the old Islamic caliphate (as well as Kievan Rus) in the west. Hulagu Khan's destruction of Baghdad in 1258 is traditionally seen as the approximate end of the Golden Age. Later Mongol leaders, such as Timur, destroyed many cities, slaughtered hundreds of thousands of people, and did irrevocable damage to the ancient irrigation systems of Mesopotamia. Muslims in lands subject to the Mongols now faced northeast, toward the land routes to China, rather than toward Mecca.
Eventually, most of the Mongol peoples that settled in western Asia converted to Islam and in many instances became assimilated into various Muslim Turkic peoples. The Ottoman Empire rose from the ashes, but (according to the traditional view) the Golden Age was over.
The issue of Islamic Civilization being a misnomer has been raised by a number of recent scholars, including the secular Iranian historian, Shoja-e-din Shafa in his recent controversial books titled Rebirth (Persian: تولدى ديگر) and After 1400 Years (Persian: پس از 1400 سال), in which he questions whether it makes sense to talk of a category such as "Islamic science". Shafa states that while religion has been a cardinal foundation for nearly all empires of antiquity to derive their authority from, it does not possess adequate defining factors to justify attribution in the development of science, technology, and arts to the existence and practice of a certain faith within a particular realm. While various empires in the course of mankind's history had an official religion, we do not normally ascribe their achievements to the faith they practiced. For example, the achievements of the Christian Roman Empire, Byzantine Empire and all subsequent European empires that advocated Christianity are not normally considered one civilization.
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- Astronomy in Islam
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Although they were probably unaware of the mathematical properties and consequences of the construction rule they devised, they did end up with something that would lead to what we understand today to be a quasi-crystal.
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