I'm sure this has been covered elsewhere but I'm not hitting on the right combination of search terms to find it.
I'm a little confused about grievance penalties. I get that if I'm at war with some civilization, and I capture their cities, they accumulate grievances against me. When the war ends, and I keep the cities, the grievances slowly begin to decline, a few points per turn. That all makes sense, and I don't expect that civilization to be friendly toward me again.
However, it seems that other civilizations get negative modifiers toward me (not grievances), based upon "You caused grievances to others," and these do not decline even after the original grievance has decayed away to zero.
Is it possible to have wars with some civilizations and remain friendly -- like, friendly enough to have friendships and alliances -- with other civilizations? I am just finishing up a domination game in which obviously everyone hates me by the end, which is fine, but earlier on, when I'd only gone to war with civilizations on my continent, it would have been helpful to maintain decent relations with those on the other continent. And even in a non-domination game, sometimes it's necessary to have a war or two (sometimes you don't get a choice! but I don't want to be punished for the rest of the game for taking a city or two off the hands of a neighbor who picked a fight with me).