Why was the growth of great empires less likely to develop in ancient greece

Ancient Greece was never united as a nation (even when subjected as a unit under the Makedonians and Romans). No single Greek city-state could rise to imperial power because the other Greeks would counter the imbalance. This is exactly what happened in the Peloponnesian War: Athens was growing powerful into a quasi-empire and the other Greeks felt threatened so Sparta stopped Athens.

Yeah i’ll call ya later i don’t have any money to go out there