the thing as a whole is a lie.
And frankly, history doesn't tend to show the transition from bondage to spiritual faith very often. Far more common is the transition from bondage to an outside power to bondage to the worst available local thugs. The skill set for revolution tends to be mostly destruction and disruption. And while bondage may sometimes lead to spiritual faith and courage, mostly it makes people mean and selfish. Ghandi and Havel are remarkable exceptions, not normal revolutionaries.
I'm not sure what civilizations are being counted in the average, or what the 200 year bit is. Is that the golden age, or does it count the rise and fall? Are we talking bondage to bondage? Golden ages tend to be short (20-100 years) and civilizations tend to linger for a long time depending on what you count as The End.
The only civilization that I know of that followed anywhere near that path is the Jews up to the destruction of the Temple, and 1) only if you take the Old Testament as a serious history book and 2) remarkable as they were, I don't think the group was big enough to count as a great civilization.
But I'm just being silly. This isn't real. This is somebody making history up to support deification of the Founders (hmmm, spiritual faith to great courage to liberty, 200 years ago, isn't that a remarkable coincidence, other than the Founders being mostly Deists and that only because they didn't have the guts to admit they were atheists) and make some school building referendum The End Of Western Civilization. You can't take it seriously if they can't even admit it is their own idea.