Government, policies and the golden age

The big idea: When the Abbasids took power in 750, they built the most sophisticated government the Islamic world had ever seen.

At the top sat the caliph, but the real day-to-day running of the empire fell to a chief minister — the vizier — and a set of specialist departments called diwans.

The Abbasids moved the capital east to their new city of Baghdad, founded in 762. This shift towards Persia mattered.

They borrowed heavily from old Persian traditions of kingship and administration, which made the government far more centralised and professional than the simpler Arab rule of the earlier Umayyads.

The Barmakid family: Under Harun al-Rashid the vizierate was dominated by one Persian family, the Barmakids.

For nearly seventeen years they effectively ran the empire — controlling finance, appointments and policy — until Harun suddenly destroyed them in 803, executing or imprisoning the family. Their fall is the classic warning of how dangerous it was to grow more powerful than the caliph himself.

Spot it: centralised, Persian-influenced, professional: The Abbasid state was a centralised bureaucracy run by a vizier and specialist diwans, modelled on Persian practice. Remember the pairing: vizier at the top, diwans underneath.

The reigns of Harun al-Rashid (786–809) and his son al-Ma'mun (813–833) are usually called the golden age of the Abbasids.

This was the moment when Abbasid wealth, prestige and learning all peaked at the same time, and Baghdad became the most dazzling city on earth.

Harun and the '1001 Nights': Harun al-Rashid became so famous that he ended up as a character in the story collection 'One Thousand and One Nights', wandering his glittering capital in disguise.

That legend tells us something real: his court was seen, even by later generations, as the height of luxury, culture and power. He also exchanged gifts and embassies with Charlemagne in far-off Europe, a sign of his global prestige.

Al-Ma'mun and the Mihna: Al-Ma'mun was not only a patron of scholars — he tried to impose a religious doctrine on his empire.

From 833 he launched the Mihna, an inquisition forcing judges and scholars to accept the belief that the Qur'an was created rather than eternal. Those who refused, like the famous scholar Ibn Hanbal, were imprisoned. It showed the caliph claiming authority over doctrine itself — and it ultimately failed, damaging the caliph's religious standing.

Why the golden age was possible: The intellectual glory of the Abbasids rested on money.

A rich economy — farming, trade and a trusted currency — paid for scholars, translators and libraries. Understand the economy first, and the culture makes sense.

Abbasid wealth started with agriculture. The fertile lands between the Tigris and Euphrates, watered by careful irrigation, produced huge tax revenues that funded the whole state.

On top of that sat long-distance trade, because Baghdad sat at the crossroads of the world.

The Bayt al-Hikma (House of Wisdom): This wealth funded the most famous institution of the age: the Bayt al-Hikma in Baghdad, especially expanded under al-Ma'mun.

It was a centre where scholars gathered to study, debate and above all translate. It made Baghdad the intellectual capital of the world.

The translation movement: The great achievement of the House of Wisdom was the translation movement.

Scholars translated Greek philosophy and science (Aristotle, Galen), Persian literature and administration, and Indian mathematics and astronomy into Arabic. This preserved ancient learning that might otherwise have been lost — and centuries later much of it passed on to medieval Europe.