Has anyone ever been able to figure out how to get any use of PRO other than a drill promotion? I disagree with people who say that the AI just comes in your land and pillages and never attacks your cities. Actually, if your military is weak enough, the AI will behave somewhat like a human and beeline to your city and try to take it. So then your protective trait would come in handy, right? Well...basically what this means is that if you build a military strong enough to defend yourself, the AI will rape and pillage the country-side. If you don't build a strong military, your cities will get taken (protective or not). It's a bit of a catch-22. Not only that, but once seige weapons join the game, the protective trait becomes all but obsolete. Yes, drill promotions reduce collateral damage, but that just means Monty or Shaka need to bring a few more catapults. It's stuff like this that has me scratching my head...what were the guys at Firaxis thinking?? I also play Warcraft 3 and for those of you who play it as well you know that Blizzard has spent thousands of hours carefully and meticulously balancing the game with dozens of patches. I know Civ isn't really played professionally or competitively, so it's a bit different...but even if it's lower stakes, the fact that a trait is so pathetically underpowered can make the game un-fun. For example, the HRE have a good UU and great UB and they can grab a religion, which makes me want to play them sometimes...but they get imperialistic and protective...2 traits that make them very boring to play 
