I don't think I ever made a topic for this game, but I'm not sure why.
I just finished playing a particularly good round where It was me and a three of others (one 'hold my own borders', two warmongers)
Well somehow I got in good with everybody diplomatically. Nobody wanted to go to war with me thanks to a combination of my strong ships and yet kind treatment of them. About 2/3's of the way through, a global event hit and turned the 'hold my own borders' guy into a slowly dawning military GOD. By this time I'd already managed to seccure a permenant alliance with him though, so I was just able to follow his slowly increasing fleets around plopping down influence starbases everywhere. He never got quite strong enough to actually conquer the other empires, so my culture had time to seep into every corner of the map and secure for me a cultural victory.