What have the Romans ever (actually) done for us?

[-Praetor-]

Roman Law - A lot of it is still used (or taken reference to) today. Not just Britain (and her colonies) and Europe, even the yanks, bits of africa and even asia.

No it isn't, Britain, much of the Commonwealth and the US have common law systems. Those are based on precedent of past cases, rather than reference to a central legal code, as civil law systems like Scotland and much of Continental Europe (courtesy of Napoleon) are.

That´s not entirely true. Both Civil Law and Common Law systems have a common denominator, meaning that both are at least in their origins heavily based on Roman Law. It does not mean that we still apply it, but when someone studies the Praetor´s Edicts one can find strong simmilarities with the fundamental principle of the precedent system of the Common Law, and when one studies the Codification process of the Corpus Iuris Civilis one can find immediate simmilarities with the Code Civil.

That´s just a draft, one could write books (as many already have) about the influence of roman law in both systems, and the reason why institutions like the "actio de in rem verso" can still be found in both systems.