Actually, my suggestion for the extra being converted to on a specificly the weakest common tech a Ai or Player knows of, but doesn't have, is to speed up tech diffusion without the constant AI begging for it. I may be getting what is considered tech diffusion wrong... but with the option on it tends to slow down the game with the every other turn being a constant barrage of "Gimme! Gimme! Gimme!" from the Ai. I think you have to be careful about adjusting tech rates to much... researching things at the speed of eternity takes between 10-15 turns to complete a topic if its about the level your Civ should be research right then. adjusting it too much with cause other issues. I think it may also mean C2C needs to actually explain what population points actually mean. Critical mass for a technologic endless charge of progress tends to hit around one million people in a society from the working estimates I've heard. At that level you have enough people that don't need to farm or guard or run things that you can have people with enough free time to study things and research. At that point you should get a massive research boost. --- 2% isn't worth bothering with a revolution for... the AI doesn't bother changing civics until it hits oral traditions. This means the AI is already inventing language to explain stories it has before coming up with a way a method of comunicating that the stories are ment to speed up. Lets explore Language for a minute: -0% Can't comunicate anything that isn't right the happening now. Point and grunt interface. -5% Now your group understands these 'word' things express concepts and actual things in a standardized format, but you haven't had a chance to get more than the basics down. 10% Trade: You doubled your skills at explaining things to the point non local can get what your after, kinda 25% some rare people understand what your language and those guys language mean... and can explain to both groups. 50% Now that its common to find people that speak other languages. 100% we have fancy machines to tell us what they ment without ouside help! Programmers never meake mistakes... ever. Anyway... I'd go with 0% 5% 10% 20% 40% then 50%. The first three upgrades are real tangle advance. The last two are just streamlining the process and speeding up the rate of communcation. So those I'd adjust.