Other republican groups fought to overthrow aristocratic governments. this lead to the french revolution is a main example
Not sure if this will help but here's what I put:
They developed lots of new techniques for buildings and constructions. They also brought about incredibly well put together aqueducts that ran for miles. They built military roads and they are still a basis for many things that we build today.
They talked about equality under the law, and also came up with The Twelve Tables, which are very well known today. Christianity was banned in ancient Rome and Christians were punished for a very long time because of this. They were even fed to lions as entertainment.
Dramatic global cooling with the oceans freezing to a depth of perhaps 1000m
