Most Influential Civilization?

[Millennium]

Although one can go on and on about the moral consequences of some civilizations' influences, the thread is only about who had the most influence: morality is technically outside the scope of this discussion.

I tend to consider some of the listed civilizations, influence-wise, as continuations of their predecessors, particularly in terms of Greece/Rome and UK/US. But in terms of influence on the current state of the world in forms that those civilizations might still recognize, I would consider it a toss-up between three: Anglo-American, Greco-Roman, and Chinese. It is true that Islamic dynasties have also had some influence, but many of the forms those influences took have been altered to the point where they're no longer recognizable unless you really dig deep. Case in point: it's thought that common law as used in most English-speaking countries (as opposed to civil law, popular in countries with a stronger Roman influence) was heavily influenced by Islamic law, but few people on either side of the equation actually know this.