While a piece of what we understand as civilization as a whole certainly came from the Greeks, let's just say not everyone there looked like all the Irish guys from the movie 300. I don't expect Steve King's understanding of history is much better than that.
It's amusing to think of the general lack of contributions by Europeans to the world at large during the 400 years often called the "Dark Ages", but even that is too dull a statement. Instead, let's just note a few things civilization could have done without:
- 100 Years War
- Destruction of the Library of Alexandria
- European Imperialism
- Fanta and Mentos