Sparta is not exactly known as the pinnacle of civilization. As for the rest of your comment, you make some good points.
Sparta is quite possibly the pinnacle of horribleness for civilization, which is why I think they emphasized that it particularly was a slave society (80%+ slaves and a majority of the remainder were non-citizens).
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Sparta is quite possibly the pinnacle of horribleness for civilization, which is why I think they emphasized that it particularly was a slave society (80%+ slaves and a majority of the remainder were non-citizens).