Final answer:
The world’s first great civilizations shared traits such as redistributive economic systems, elite warriors trained to fight from chariots, and common diplomatic practices.
Step-by-step explanation:
The world’s first great civilizations shared several common traits. They all used a redistributive economic system where agricultural goods were collected as taxes and redistributed to urban artisans, merchants, and officials. They had military forces of elite warriors trained to fight from chariots. They interacted using a common set of diplomatic practices, such as using a common language (Akkadian cuneiform), arranging military alliances through marriages, and vassal states paying tribute to dominant states.