the biggest problem in my opinion in civ 5 is happyness. the biggest problem in my opinion about happyness is the hapyness per city. it should be the opposite, the more cities you have, the happier your people must be. here are some historical examples: when napoleon conquered europe, the french loved him, they didnt hate him when the roman empire was at its largest, the romans where very happy, not angry. summary, i dont understand why your people become unhappy when you have loads of cities.