The new game should have political motivations: without the factories, you would not have the proletariat , and without the proletariat , you do not have the possibility of a revolution , communist - or socialist , without the barbarian invasions you do not have feudalism , the system , banking , modern , the rise of the city dynasties and therefore of the Renaissance , the great trade , marco polo , in a hypothetical Roman empire Moderna would have been different : wars , revolutions , dynasties , emperors . So it makes no sense, the system of government , the political system, economic , only in abstract form, of bonuses, but also have repercussions on the economy. And about the population