Population dynamics are the most pervasive forces of internal change to a civilization.
Population dynamics are the most pervasive forces of internal change to a civilization. A sudden population shift or a shift in demographics may force a civilization’s infrastructure to break down. Populations may grow, due to migration or a period of unusual health. Populations may shrink, due to disease, extreme weather, or other environmental factors. Finally, populations may redefine themselves. As civilizations grow, cities may grow larger and become more culturally distinct from rural, agricultural areas. Large empires may extend across such large regions that languages, cultures, and customs may dilute the identity of the empire’s residents.