Mr. Zinn starts off by using an arsenal of famous thinkers, pointing out their pessimistic views and believes on human behavior. Views based on no concrete evidence that we humans are born with this trait called violence. Zinn starts off using Machiavelli's positive view in the "The Prince" that humans tend to be bad. Zinn add great minds such as Einstein and Freud and their correspondence to illustrate their own views on the subject, and their conclusions that humans are violent by nature. Other scholars are also thrown in to support this traditional view of human nature being evil.
The writer goes on with the idea that scientific evidence doesn't proves it, and that is the notion that humans are in nature prone to violence. Howard picks on some scientific fields to show as that there is no evidence of human instinct for the kind of aggressive hostility that characterizes war. He turns to sociobiology, where the Harvard professor E.O Wilson in his book "On Human nature" answers with a yes on