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Biological Basis in Human Populations

Are there any benefits to violent behavior? Are some people pre-disposed to act violently?

In this chapter, you will read about two modern day tribal societies who exhibit high-risk violent behavior for specific social gains and how they dehumanize their neighbors in order to go to battle. Finally, you will hear about common biological differences in the brain of murderers which present a tendency toward violent behavior and what social factors can help mitigate this predisposition.

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Adaptive Behavior: physical traits or behavior produced by natural selection. For an adaptation to persist and spread in a population it must be beneficial. Dept. of Anthropology, University of Missouri-Columbia   

Amygdala: in the brain, one of the integrative centers for emotions, emotional behavior and learning, motivation, and fear-related memory. It also regulates additional cognitive processes, such as memory or attention The Amygdala and Emotion

Other: the condition or quality of being different, particularly if the differences in question are strange, bizarre, or exotic. The concept of 'othering' creates opportunities for designating others as sub-human in order to justify hate crimes. Encyclopedia of Qualitative Research Methods

Pre-Frontal Cortex: an area in the brain that regulates problem solving, emotions, and complex thought. New York Academy of Sciences

PTSD or Post-Traumatic Stress Disorder: a mental health condition triggered by a terrifying event — either experiencing it or witnessing it. Symptoms may include flashbacks, nightmares and severe anxiety, as well as uncontrollable thoughts about the event. Mayo Clinic 

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