Morale in C-evo, like happiness in Civ Series games, is one factor in efficient city operation. A city needs one morale point (shown as a heart icon) for every population point to avoid disorder and the consequent lack of production. Each city centre tile provides four morale points, as partial compensation for never providing any trade points. Additional points can be gained from: Unlike the Civ Series games, C-evo does not vary morale points depending on difficulty level. The cost of constructing buildings is the only relevant factor linked to level of difficulty.