What is one problem the city-states of sumer faced by remaining independent?

a

explanation:

early greek culture has had an important impact on government and education. first of all, they established the democratic political systems and procedures we have today. consequently, we inherited trial by jury for example. considering education, greek philosphers, mathematicians set he intellectual basis of different areas of studies. in addition, the alphabet originated from the phoenician alphabet into the one we have today and the first library was built in egypt. moreover, greek culture has an impact in current art, architecture and sports disciplines.