As we have seen, system-level analysis offers many insights into the question,Why? Just like individuals states have free will. But what individuals an states are likely to do is constrained by the social - economic - political systems in which they operate. Understanding those systeme helps explain what individuals an states have done and, to a degree, what they may do. Certainly, it remains hard to predict the behavior of either individuals or international actors. One reason is that our analytical abilities have only advanced so far. Social science is still a relatively new endeavor. The second reason is that actors sometimes do the unexpected for inexplicable reasons. For countries, it is a phenomenon that one scholar labeled "crazy states" (Dror, 1971). Still, the action is not random,and,as the old saying goes, exceptions do not disprove the rule.