In a recent COTM, the Indians had the GL. I had made it through the Ancient Age fairly well, but I had shut my Science off before even learning Theology. This was a Diety game, and the AI was out-pacing me to the point of insane. Anyway, after many years (not sure, but a LONG time), I waited for the Wonder Initiation pop-up for the Theory of Evolution. What I was interested in was Replacable Parts, but this gave me a good clue. I then captured the GL and, in one turn, I was rocketed into the middle of the Industrial Age. It was pretty cool. In retrospect, I probably waited too long, as I was soon after defeated by the Carthaginians in a Cultural domination.