The AI Entity wonder cedes the day-to-day running of a Civilization to a single, overarchirng supermind. Now, not a joule of energy is wasted (in theory,at least), which provides free <l:6,126>Maintenance<e> for most City Improvements. However, the individuals bereft of the joys of wasting said energy aren't too pleased, and the overall <l:6,96>Happiness<e> suffers (-4).
