Answer:
Well to start and probably most importantly, the Greeks are considered to be the founders of democracy. They also had some of the first voting systems. So technically all modern law that dwells in democracy originated in Greece. Rome expanded on that democracy and created what I would consider the most powerful government that held together an empire. They had levels to their government which made organization greater. The most well known position would be senator. Overall, many of the systems that we have in our society such as voting, debates, centralized government and even more than one branch, were all practiced in Rome.
Step-by-step explanation:
Greeks - Democracy and Voting
Romans - Centralized Government and Government Positions