The OJ case explained by evolutional theory.
While watching this series I was sometimes thinking that OJ is the textbook charming psychopath, but in afterthought I think that the level of power and fame OJ rose to through his life is something that will corrupt most human beings and human beings around him.
In most of human history the level of power and position in the social hierarchy that OJ came to have is something only compared with royalty. In most of human history these people have been above the law and have indeed acted upon it. The difference is that these acts did not result in a fall from grace for the perpetrator like it did for OJ which happened to be born in a modern age.
I think human beings are ultimately hardwired to act this way. Wherever you are in the social hierarchy yourselves, you have less concern about what people below you think of you than the people above you (yes, you who do not admit so, you have it too!), and logically enough you have a higher concern about what people above you in the hierarchy thinks about you than people below you. Taken to the extreme; if you are on top you will kill those below you without remorse, and you will rule in favour of those above you no matter how strong the evidences is. If we think about humans as herd animals it makes sense that acting in this manner will, in a premodern time, give you more reproductive success than not, and this is a trait that the modern human has inherited as a result of evolution.