Some of these reasons could be external - such as collapse of the international financial system; but many could be internal - such as poor governance, civil war, deteriorating environment, and so on.
有些原因是来自外部的――例如国际金融体制的崩溃；但许多可能是来自内部的――例如较低的管理水平，内战，恶化的环境等等。