Iraq

When Arab armies swept into Mesopotamia in 636 CE and defeated the Sassanid Persians at the Battle of al-Qadisiyyah, they needed a name for the flat, river-laced lowlands they had conquered. They called it al-ʿIrāq. Where the name came from is still debated. Some trace it to Aramaic, specifically to a word for the bank or shore of a river. Others point to Uruk, the ancient Sumerian city occupied continuously since roughly 4000 BCE, as one of humanity's first urban centers and a plausible namesake.

The Persian theory is equally plausible. In Middle Persian, erāq meant lowland, which fits the geography precisely: Iraq is largely flat alluvial plain, the sediment of the Tigris and Euphrates. The Greek and Roman writers knew this territory as Mesopotamia, meaning the land between the rivers, but Mesopotamia was always a geographic description. Al-ʿIrāq was a political name, and it was the name that lasted.

Under the Abbasid Caliphate, founded in Baghdad in 762 CE, Iraq became synonymous with the intellectual center of the medieval world. The House of Wisdom translated Greek, Persian, and Indian texts into Arabic, and Baghdad grew into one of the largest cities on earth. The geographer al-Muqaddasi, writing around 985 CE, called Iraq the heart of the earth. Scholars, astronomers, physicians, and mathematicians gathered in its cities for three centuries.

The Ottoman Empire administered the region as three separate provinces: Mosul, Baghdad, and Basra. When Britain received the League of Nations mandate after World War I, it merged those provinces into a single administrative unit and formalized the English spelling as Iraq in 1920. The new state's name compressed roughly 6,000 years of continuous habitation into five letters. The city of Uruk, whose name may have started it all, now lies beneath sand dunes near modern Warka in southern Iraq, a UNESCO World Heritage Site since 2016.