The proper role of a government in a capitalist economic system has been hotly debated for centuries. Governments in capitalism are public, not private institutions. They do not engage voluntarily, but rather use taxes, regulations, police and military to pursue objectives that are free of the considerations of capitalism.
Possibly the major geographic feature that served as a barrier to political unity in Greece were the mountains: the Greek cities were placed in valleys between the mountains.
A second feature would the the peninsulas and the islands: for example Crete is an island and this also helped in separating it from the other Greek towns.
It was harsh on their bodies and the pay wasn't that good