๐ง๐๐ ๐๐๐ฅ๐ ๐๐๐๐๐ฆ, ๐ ๐ง๐ฅ๐๐๐๐ ๐ง๐๐๐
If the Umayyads were the first ever Arab Empire, then the Abassids can be rightfully hailed as the Pioneers in Multicultural empirical reign.
The contrast between the governance and constituency of each empire couldn't have been any more dissimilar, and for good reason too. While the Umayyads maintained a distinct and strict central regime characterised by a prominent Arabic heritage, the Abassids adopted a more regional and decentralised Franchise which embraced and incorporated various languages and cultural influences. In fact, the Abbasid Revolution was in many respects a revolt masterminded and spearheaded by the discontent 'Ajjam (non-Arabs) against what was perceived to have been an elitist Arab-Supremacist regime under the reigns of the Umayyad Caliphs.
In sharp contrast to this, the Abassid Caliphate implemented a diversity policy that was so inclusive and accomodating that it very nearly undermined the reign of the Caliphs and almost deprived them of central authority altogether.
(๐๐ช๐ฅ๐ฆ๐ฏ๐ฐ๐ต๐ฆ, ๐ต๐ฉ๐ฆ ๐๐ฎ๐ข๐บ๐บ๐ข๐ฅ๐ด ๐ฉ๐ข๐ฅ ๐ข ๐ฎ๐ถ๐ค๐ฉ ๐ด๐ต๐ณ๐ฐ๐ฏ๐จ๐ฆ๐ณ ๐ด๐ฆ๐ฏ๐ด๐ฆ ๐ฐ๐ง ๐๐ด๐ข๐ฃ๐ช๐บ๐บ๐ข ๐ข๐ด ๐ฑ๐ฆ๐ณ ๐๐ฃ๐ฏ ๐๐ฉ๐ข๐ญ๐ฅ๐ถ๐ฏ'๐ด ๐ต๐ฉ๐ฆ๐ฐ๐ณ๐บ ๐ฐ๐ฏ ๐ด๐ฐ๐ค๐ช๐ข๐ญ ๐ค๐ฐ๐ฉ๐ฆ๐ด๐ช๐ฐ๐ฏ ๐ข๐ฏ๐ฅ ๐ต๐ฉ๐ฆ ๐ณ๐ช๐ด๐ฆ ๐ฐ๐ง ๐ฆ๐ฎ๐ฑ๐ช๐ณ๐ฆ๐ด)
As a matter of fact, such was the influence of the 'Ajjam (Non Arabs) within Abbasid realms that one particular family virtually ruled the empire from behind the scenes for a considerable period of time.
Enter the ๐๐ฎ๐ฟ๐บ๐ฎ๐ธ๐ถ๐ฑ๐, ๐๐ฟ๐ฎ๐ป๐ถ๐ฎ๐ป ๐๐๐ฑ๐ฑ๐ต๐ถ๐๐ ๐ฐ๐ผ๐ป๐๐ฒ๐ฟ๐๐ ๐๐ผ ๐๐๐น๐ฎ๐บ.
They were a priestly Buddhist family of Iranian origin who occupied the region of Balkh, in Khorฤsฤn. The Barmakids derived their name from the high Priestly cast of Barmak, which was a post recognised within the Buddhist temple of Nawbahฤr.

The family converted to Islam in the 7th century when Balkh fell under Muslim reign during the Caliphate of Uthman Ibn Affan. The Baraamikah were highly educated, trusted and respected members of society, becoming Finance Ministers, Regional Governors and Viziers to the Caliphs. They had also been respected by the Umayyad administration during the reign of Caliph Abdul Malik Ibn al-Marwan however their true potential was realised under the Abassid Caliphate.Khalid al-Barmaki was the first of the Baraamikah to serve the Abassid Caliphs, beginning with Al-Saffah and Al-Mansour.
His influence and prominence enable him to cement himself in the empire's administration allowing his family to grow ever more influential and powerful. At the height of their power, the Baraamikah even controlled the Caliph's elite military regiment in addition to keeping their own private army (Mamluks).
Although we do not know how this family was eventually dismissed from the Caliph's court altogether, what we do know is that their influence and affluent lifestyle did arise concerns from Harun Al-Rasheed during his reign. There are many elaborate theories and accounts detailing how they were ultimately expunged from their powerful posts and role within the Abassid Empire.

You may be interested to know that the Barmakids inspired one of Disney's most villainous characters. ๐๐ฎ'๐ณ๐ฎ๐ฟ ๐๐ฏ๐ป ๐ฌ๐ฎ๐ต๐๐ฎ ๐๐น ๐๐ฎ๐ฟ๐บ๐ฎ๐ธ๐ถ was the real life vizier who inspired the infamous Jaafar from Disney's Aladdin franchise.
Jaสปfar ibn Yahya Barmaki was a real person (though not as villainous as portrayed by Disney) and was so close to the Caliph Haroon Al-Rasheed that they two were considered brothers, having virtually grown up together, raised by Yahya Al Barmaki, a very wise and powerful advisor to Caliphs Al-Saffah and and Al-Mansour.
The Barmakid family converted into Islam after having been a prominent Buddhist family in Balkh (within the Nava Vihara Buddhist Order). Over the centuries the legendary influence of the Barmakid family inspired eventful tales of the conniving evil Vizier who was plotting against the Caliph in order to seize power for himself and marry the Princess (which ironically was reportedly going to be the case with Ja'far and Haroon's sister Abbasa bint al-Mahdi).
Sadly, the Barmakids were rounded up one night and swiftly executed by Caliph Haroon Al-Rasheed for no apparent reason known to historians. Their prominence was short lived however they remained In folklore and cultural tales (Arabian Nights, Aladdin etc).