Why did the city-state change around 2000 BCE? How did this change affect the governmental structure of the city-states?

The city-states changed in 2000 BCE as they became weak and easy to conquer by outsiders.

Explanation:

A city-state controlled its towns and villages, but city-states fought with one another over resources and territory.

Around 2000 BCE, the region became weak due to conflict, which made it easy to conquer by others. The change implemented regarding the economy and government after the capture. People were allowed to work, trade and do businesses along with paying taxes. The rulers of the city-states became more powerful, began to exercise their authority over others, and established dynasties.

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )