Domination
A domination victory is all about taking over other civilizations. You’ll want your army strength as well as city defenses (for when they inevitably retaliate) up for this one, and you’ll need to choose policies with a very “military” outlook to them. Keep in mind rulers tha You won’t be the most beloved civilization, that’s for sure.
Base Game: You simply had to be the last civilization with your own, original capital city still under your control. You could just take over everyone’s capital cities and you’ll be set, or you can let someone else do the dirty work, then take their capital. Either way, all that matters is that you’re still in possession of your original capital city.
Brave New World: You don’t just have to have your own original capital city; you need to have that and every other civilization’s original capital city under your control.