Funny. I think the story of Thermopylae is a wonderful tale of the few making a last stand against the many and saving their people. A wonderful story and event. I'm just laughing at turning it into "Our culture is so much better than yours and always has been" pissing contest. First because Islamaphobia, like most prejudices, is stupid but second because historically the West has not always been democratic or free-thinking or even more advanced than the Middle East as the movie suggests.
I'm not defending anything so much as saying Miller's vision of wolrd history is laughable.
The Roman Republic was a natural progression. The Roman Empire was something else entirely. Democracy for all intensive purposes disappeared with the rise of Augustus from the world until the American Revolution...unless you want to count the Magna Carta and/or British Parliament post-Glorious Revolution as its return, but I do not.