You're the only one at war at all times. As soon as you meet someone the computer takes over for you and says "You have declared war on XXX" Then they get mad, naturally. And you can never use diplomacy with them, as far as I know. My current game is a continents always war. I turned off the UN, cultural, time, and space victories. I'm in the middle of wrecking Gengis' middle ages. Toku is next, btw. Its a little more difficult on continents, since you've got to wait till Galleons to really bring the heat to the enemy. Should have thought of that when I setup the game...