History tells us that “expansion” and “expression” march hand in hand. The nations which are successful in “expanding” their frontiers, by military, economic, and diplomatic measures, generally excel in “expression.” They are overflowing with intellectual energy and they “express” themselves in great works of art, literature, history, philosophy, and theology. But the communities which remain confined to their own geographical area, and rarely try to conquer new territories, tend to become intellectually stagnant. They have no art, no history, no literature, no philosophy, and no theology. The ability to conduct brutal military campaigns is conducive for intellectual activities (as long as the military campaigns are successful and the empire is politically stable).