Wolf of Hate

My article basically discusses whether or not hate is naturally present in human society.

The article touches upon the evolution of hate and why it can be present in many people. In addition to this, the article also discusses how hate is processed through the brain. 

From a brain standpoint, it consistently talks about the fight or flight response that is present in most human beings when their adrenaline is pumping. 

However, my question is do you think that hate is natural in human beings or is it something that is aquired?