Ok guys, this is one thing that really peeves me because I don't seem to get a good handle on it. I play gigantic/9 opponents, though I think only the latter matters. When I play my game I try to get good standings on relationships with everyone so I can avoid unnecessary wars... and 99% of the time I'm successful at achieving Neutral or better with everyone due to diplomacy, trade, military power etc...
But then comes the time where I want to get to do some warring because I need to since I play military conquest only. First war is fine, I'll usually pick the most powerful opponent that is close by so I can double my empire size. I knock em off, no problems.
Then the second war comes... and all hell breaks loose. The problem is, I'm still in good standing with everyone before I pick a target, so no matter who I start a war with, I'll always get at least one (and mostly more) other opponent(s) saying "You did that unprovoked, so we're gonna smack your ish up!" Then all of a sudden everyone hates me, and it becomes a game of me versus everyone else remaining. So, upon my declaring of a second war, consistently all my relations go from wonderful to hate... in like an instant. Any tips on how to avoid this?