I was thinking of the consequences of an all-out war between civs and how survivors may be left with a shattered society (decimated populations, major cities with important buildings and Wonders lost, etc...). It would be neat if a civ could actually lose Techs (due to lost Libraries, Universities, scientists, etc...) and find itself falling into a post apocalyptic Dark Age. It wouldn't be realistic (or fun) for a civ to lose ALL its Techs but enough so that it's set back an era or two To get these Techs back (or new ones) the civ will have to rebuild itself and start learning again, or trade another civ for them. I just thought this scenario could be more fun than the current model of everyone getting more and more advanced with no worries of setbacks. I also found this old thread which deals with a similar (but not identical) scenario: http://forums.civfanatics.com/showthread.php?t=190208 Anyone think this in implementable?