Hmmm... There are others at Firaxis who are better at the game than I am. You, I imagine, are better at the game than I am, as are most people here. As I've said, my job is to make the words pretty and the history more or less check out - I'm a historian and writer, and not a designer or playtester. I don't play above Emperor, and normally play on King. But they'll chase the nearest unit. Get some recon units to lead them away; get some city projects to grab them and toss them away. The last zombie game I played I made a fortified line of traps (remember they damage ON and ON ADJACENT tiles) in front of walls and let those lines damage or kill zombies that came too close - I got the It's a Trap and Hello Mr Fancypants achievements for doing that. I avoided settling near any place that had been a battlefield - ever - and kept a close eye on the one or two ancient battlefields behind my wall (there were one or two). I did not try to settle Beyond the Wall, and the one foreign capital (in other words un-raze-able city) out there (Harald's poor city) I had I had to pretty much abandon. I had a safe heartland of about five (Khmer) cities which could produce things OK, whereas the AI was pretty destroyed (except for a peaceful Mapuche off in the distance). I waged a small war on Mapuche to cripple his growth and ended up with a science victory. Looking at that screenshot... I would use the Ultimate Nuke, which is "Retire". That world belongs to the dead now. In the future, I might try to avoid provoking early wars. In my old game, the zombies mostly came because Harald, Eleanor and I got into a three-way fight that seeded the ground with Badness that eventually killed the world (pretty much). If we hadn't started that Ancient and Classical-era war, we would have a lot fewer (and thus a lot weaker) zeds walking around.