Contrary to the previous answer to this question, Roman culture very much lived on.As the Western Roman Empire neared its end the Barbarians became "Romanized" in a sense much more than the Romans became "barbarized".
I don't know if your teacher would like this but there are no good guys or bad both killed for there own agenda or reasons
Before the development of money as a medium, goods and services were exchanged through a barter system.
It's not necessarily that judges keep the country "safe" from political majorities, but instead that they don't allow the rule of law to be overturned by large groups of people, no matter how "loud" their voices.