Most of it sounds pretty good. Maybe reword it like this if you're wanting to switch it up. Like I said, it sounds pretty good as you have it though.
Religion shaped the structure and social caste of the four River Valley Civilizations because the Mesopotamian and Indus River Valley priests held vast amounts of authority and were considered to be head officials of the civilizations' primitive forms of Democracy.
Answer: The first wedding/Marriage was in 2350 B.C.
The first recorded evidence of marriage ceremonies was united when one woman and one man dated from about 2350 B.C., in Mesopotamia. Over the next several hundred years, marriage evolved into a widespread institution embraced by the ancient Hebrews, Greeks, and Romans.
Souks are not cities in which almost no taxes are placed on goods sold there.