Any suggestions what to do with flood plains? I'm early in my game playing the agricultural Iroquois and have a lot of flood plains in my corner of the world, several with wheat. As I can't mine them, I find my cities there are growing faster than I can crank out settlers and I'm getting unhappy faces and civil disorder. I'm trying to mine rather than irrigate the nearby deserts to balance things out, but realized it's moot as I'm still in despotism. I hesitate to pop rush as I'm having a hard time with happiness as it is. Aside from the obvious (tweak happiness spending, get some luxes) any thoughts?
On an unrelated topic, in the discussion earlier on the Republic slingshot, someone mentioned if you fail to get it, you can use philosphy for map making. I thought you get a bonus tech only if you're first to philosophy. Do I misunderstand the "slingshot"?