4 ideas
Nasir Khusraw and his brother reached Basra destitute and in rags after crossing Arabia, and a bathhouse keeper turned them away because they looked like beggars. Once a local vizier's patronage got them new clothes and money, they returned to the same bathhouse, and the keeper stood and bowed without recognizing them. The episode shows that strangers are treated according to visible signs of status, not according to who they actually are.
In Fatimid Cairo, a merchant caught cheating was set on a camel with a bell and paraded through the city while proclaiming his offense. Combined with strong state security, this certain and visible punishment produced such confidence that shopkeepers left their stalls unlocked and jewelers and money-changers left their goods unguarded. Market trust came from enforcement that everyone could see, not from the personal virtue of individual traders.
At al-Ahsa in eastern Arabia, Khusraw found a Qarmatian polity run by a council of six rulers. Residents paid no taxes or tithes, and state-owned mills ground grain for free. Newcomers and ruined craftsmen received interest-free loans to set up in business, and trade ran on lead coins that were valid only inside the city.
Khusraw recorded what could be checked rather than marvels: prices of bread and fruit, the dimensions of mosques, the number of shops and lamps, and the Nile's height on the nilometer, which determined that year's taxes. A place is assessed through quantities that reveal how it actually runs, such as what things cost, what gets built, and how the state collects revenue. Its reputation or its rulers' claims are not the measure.