Escalation of barbarians can be understandable for much of the game, but I feel that dealing with them in the end game borderlines dealing with a nuisance or a serious pain in the rear. I mean, how do barbarians have the means to build a battleship!? Plus, barbarian Rangers NEVER HESITATE to harass your units. Let's face it, expansion becomes tedious in the middle and end game because progress in the tech tree slows down district construction, plus, unless you or your neighbors have been on a settling spree, it can be tricky to cover entire maps without going an extra mile that honestly distracts from other priorities, like city development, wonder building, etc. My request, or suggestion, is to create a mod that prevents barbarians from being able to deploy units from the Industrial era and beyond.