The Civilopedia in Civ 6 is pathetically bad. Many items I'd like information on are missing altogether, and in other cases the info shown is either inadequate or incomplete. Also, as others have noted, there's no Back button, which is ridiculous. But the thing that bothers me more than anything else is there are no links! If I'm looking at a unit, for example, and it says it upgrades to another unit, I can't just click on that new unit and go to the entry. Why not??