History student and civ streamer Paisley_Trees is discussing with a fellow historian the ages in Civ7, independent of the civ switching.
They first outline how they got to the conclusion of the date range, and discuss that this is all gameplay based, and not history base.
They then further discuss the historical concepts of ages, that a controversial book may have influened how they are used in Civ7, and that Firaxis is making interesting choices.
As last part they also discuss another topic which has come up in the forum, that the ages make civ tell a narrative, and goes away from a complete sandbox style of previous civ games.
If you’re interested in a bit philosophical discussion of the concept of ages, then have a look at the video, and discuss it with us here.