I don’t know if this is right but as someone who is native I’m going to guess during conversion of religion. Again I don’t know if that’s the main one they want but it was a contributing factor. :)
In order to know if a country is in its golden age, you need to know about its future, specifically whether or not it will perform worse than it currently does.
Hmmm I have to look that up cause anyways fly you to the moon like John cook