What were some strengths and weakneses in the political system of the Greek polis and the Roman state?

This is a
huge question, because both the Greeks and Romans lasted a long time and were complex people.
Let me deal with the Greeks first and then the Romans.

As for the Greeks, I
will use the city of Athens as an example. The strengths of Athens were chiefly due to the fact
that they made all people active citizens. In other words, they had a radical democracy. People
got involved and took ownership. This created people who intensely cared about...