Okay, I almost always refuse to teach technologies to other civilizations (unless they are far superior to me militarilly) but I do always trade technologies.. because while they may be getting new technology, I'll be getting new technology as well.. but I am now beginning to wonder if this isn't really a good idea. I just played a game where I was the #1 civilization.. I was way ahead of the other civilizations.. I had built every single wonder available to me and none of the other civilizations had built a single wonder.. it was great. Then I went exploring, traded technology with China, and suddenly China is advancing ahead of me. But it isn't only China.. it's everybody. I'm 3rd in technological advancement now.. but sometimes I jump into 2nd and back into 3rd again. China got Nukes before I even had Conscription.. But I used to be way ahead of EVERYBODY, but now I'm just at the top of the pack with the exception of China who has got a spaceship now.. Is trading technologies really this dangerous, or could it just be something else which slows me down in the middle of the second age..?