What is the premise of the political realization of ancient Greek city-states?

1. Geographical factors: The small plain blocked by Guanshan contributed to the formation of natural and political units in ancient Greece. This geographical environment is inconvenient for centralized management and suitable for independent development.

This explains why other parts of the world have formed great powers and even empires, while Greece in the Balkans is still a city-state.

2. External environment: When the Greek city-state began to develop, it was not threatened by strong external threats. When Persia invaded Greece, the strength of the Greek city-states was greatly enhanced, enough to unite against the invasion of the Persian Empire.

3. Economic factors: Due to the relatively poor land resources, it is impossible to support too many people. The polis colonized abroad and established a large number of sub-countries. The relationship between the mother state and the sub-state is not unified, but equal. Foreign colonization did not turn Greece into a great empire, but more city-states appeared.

The most important factor is geography.