The clash of civilizations is essentially the conflict among individuals from different civilizations. Individuals struggle for access to survival resources, and the scarcity of resources is the fundamental issue. When it becomes difficult to access resources alone, individuals tend to organize themselves in certain ways, and civilization could be one of these ways. However, the conflicts among different civilizations do not arise as easily as Huntington imagines, and the existence of buffer zones between civilizations is one of the factors that constrain conflict. Buffer zones appear with the emergence of civilization boundaries and are clearly visible in macro-and micro- cross-sections. The buffer zones are the concrete expression of knowledge shared by civilizations, and their formation is driven by many factors, such as economy and trade, cultural exchange, interracial neighborhoods, mixed marriages and so on.