"Although the characteristics of any civilization can change and adapt over time, they do not disappear. Significant variance on any of the variables among different civilizations can lead to conflict. If the conflict is serious and prolonged, it can, of course, lead to violence and even war. And although differences over the elements of civilization do not necessarily lead to conflict, the clash theory argues that, historically, 'differences among civilizations have generated the most prolonged and the most violent conflicts.' " The most brilliant woman i have ever met.