One of the big points of my philosophy is that there are relatively few causes for the way a person acts. It is the necessity for many decisions that create the illusion of complexity. Another aspect of this philosophy is that any given root principle will ultimately reveal itself because the effects of the principle can only be explained by that one principle and no other.
That is why I like this article by Jonah Goldberg at the National Review Online. It very succinctly puts the greatest amount of historical facts into a clean framework while showing the impossibility of many others.
There is no need for complex causes, simple causes create complicated enough effects as it is.