the Roman Empire institution collapsed, their form of society still exists and it's still at the hearth of many western civilizations. roman law, sewer and water systems, flushing toilets, aqueducts, roads, concrete, wellness centers, baths, and much more. they are all inventions of the romans that shaped the western culture, helped the social aspect of what we call "society" develop and brought higher living standards where they were not present, things that today still define the difference between developed countries and developing ones.

Paris, Milan, London, they did not know what a sewer system was and what "hygiene and cleanliness" meant, before romans made them a standard for the empire.