Thanks for replying guys!
Actually I finished that game with Afghanistan by now and reaching 100 prestige seems impossible for me. I got to 30 prestige I think, along with 50 Industry and 7 Military by the end. So that's still far away from becoming civilized ... not to forget that it wouldn't help me anything when the game is already over. Alright, I made quite a lot mistakes during the match but even if I'd do everything right I'd still only have one decade left to really get to grab some weaker countrys land. But I guess the ultimate goal would be civilizing for a rather weak uncivilized nation like Afghanistan, wouldn't it?
I was thinking about getting ViP but I'm not sure if it is compatible with Revolutions. The system to become civilized there seems a little more fair in my opinion though.