Michael Poliakoff (classicist and an administrative bigwig at UColorado) comments on 300 as #5 on National Review‘s list of the Best Conservative movies of the past 25 years:
During the Bush years, Hollywood neglected the heroism of American soldiers in Iraq and Afghanistan—but it did release this action film about martial honor, unflinching courage, and the oft-ignored truth that freedom isn’t free. Beneath a layer of egregious non-history—including goblin-like creatures that belong in a fantasy epic—is a stylized story about the ancient battle of Thermopylae and the Spartan defense of the West’s fledgling institutions. It contrasts a small band of Spartans, motivated by their convictions and a commitment to the law, with a Persian horde that is driven forward by whips. In the words recorded by the real-life Herodotus: “Law is their master, which they fear more than your men[, Xerxes,] fear you.”