The second of the two great Sunnite dynasties of the Islamic Caliphate.

The 'Abbasids took their name from an uncle of the Prophet Muhammad, al-'Abbas, whose descendants formed one of several groups agitating for change under the Umayyad dynasty. The Umayyad enforcement of a brand of Arab chauvinism, wherein non-Arab Muslims were relegated to a lower status, led to a revolution in which the 'Abbasids claimed the Caliphate and enforced a more universal community of believers. This was symbolized by their movement of the caliphal capital from Damascus to Baghdad, an area closer to the geographic centre of the empire and nearer the Persian hinterland. Under their rule, Islamic culture flourished, new heights in philosophy and science were attained, and the period was widely seen as the “golden age” of the Islamic world. During that time, however, the Caliphate's authority slowly began to erode as regional power centres developed throughout the empire. Although central authority was intermittently reasserted by strong-willed caliphs, by the 13th century 'Abbasid authority was largely spiritual. The last 'Abbasid caliph was executed by Mongol invaders, but a shadow Caliphate (of dubious authenticity) continued into the early 20th century. See also Abu Muslim.

More on "Abbasid dynasty" from Britannica Concise:
More on "Abbasid dynasty" from the 32 Volume Encyclopædia Britannica:
Search for "Abbasid dynasty" at Encyclopædia Britannica Online for all this plus dictionary definitions, magazine articles, and more.
Britannica Concise is a complete, 28,000 article, single-volume encyclopedia from the editors of Encyclopædia Britannica. Visit Encyclopædia Britannica Online to access the complete Encyclopædia Britannica, the Britannica Student Encyclopedia, a world atlas, interactive timelines, Merriam-Webster's Collegiate Dictionary and Thesaurus, hundreds of magazine titles, daily features and much more.