That's a very false statement. That's fine that you believe this, but do not say that everyone does. Civ 4 is a fantastic game, but I feel that diplomacy was poorly done in it. It was far too predictable and easy to manipulate. My problem with Civ 5 is not diplomacy, but how the AI reacts in many circumstances. The problem is that the AI does things that don't make sense even for their own benefit.