I often get PMs asking me how I rate a particular UU. It is hard enough to rate the CIV themselves considering the numerous variables involved, while trying to keep a balanced view between the 3 play styles (warmonger, balance of power, peaceful builder). Rating a UU in a vacuum, without any context to the specific map, difficulty level, player skill level, terrain or victory type sought - is perhaps an impossibility. The best one can do is to create a standard that is based on a host of assumptions. In an effort to be fair one must attempt to remove themselves from their own biases that have been formed as a consequence of their personal play preferences and most importantly from the difficulty level that they typically play within. This last bias can often blind a player completely.
