How did the geography of greece influence greeks interactions with each other

It caused independent city-states to develop.

Explanation:

The geographic system of the Greece is the influence of the Greece as it spread the message of the cation and create independent city stats form each other and as a result of this, it prevented them or interacting with each other. Especially the role of the mountain system affected the traveling time and the cropping system and the patterns of the changing livestock there affecting their food habits.   The Greece spread over a distance of about 131,957 km square. About 80% of the total territory and is largely mountainous thus the island is separate the Epirus from the Thessaly and the Macedonia.