" We can see, now, that the social background of the Empire makes wars of conquest impossible for it. Under weak Emperors, it is torn apart by generals competing for a worthless and surely death-bringing throne. Under strong Emperors, the Empire is frozen into a paralytic rigour in which disintegration apparently ceases for the moment, but only at the sacrifice of all possible growth. "

― Isaac Asimov , Foundation and Empire (Foundation #2)