I hadn't heard of the Warring States Period before but after a quick search I see your point. I guess "The Dark Ages" evoked a more universal idea that there w

I hadn't heard of the Warring States Period before but after a quick search I see your point. I guess "The Dark Ages" evoked a more universal idea that there was no progress anywhere while the "Warring States" period is understood to be more local. But personally, I was bringing to light arguments I've heard against calling it the Dark Ages. Don't have a personal axe to grind either way.