Why was it difficult for the Greeks to unite?

Firstly the 2 main Greek civilisations had different origins. The Athenians originated from the Ionians, who were forced out of the Peloponnese by the Achaens, who were forced out of their home by the Dorian invasion. read more

Both spoke Greek; Both attended the Olympic Games; So if you can recognise how each Greek civilisation was different in terms of culture, political system, social aspects, and education etc. then you can realise why they couldn’t unite easily. read more

In other words, cities ruled themselves without care or knowlegde of how other Greek city-states were running things. Laws and rules were different everywhere, and there truly was no way to unite ancient Greece as a single government. Another potential reason for Greece being unable to unite was that the city-states were rivals. read more