According to psychological and scientific studies, violence is the physical force applied to an individual in order to cause pain and several damages. Violence has been part of human life since living organisms appeared on earth; this is why for creatures violence is just another action. It has been proved that violence has been part of people’s evolution though its genes have a great influence in human’s behaviour; this is why Biological factors are quite important.
In animals there is a gene called the amygdala, stimulation of the amygdala causes increased aggression. Due to the fact that humans have the ability to reason, this situation is not so common. Personality disorders are also a biological factor that can cause violence and aggression. Also brain damage caused by toxic materials found in the environment, shocking head injury, dietary deficiencies, alcohol and drug ingestion by the mother during critical fetal developmental stages, and birth trauma can cause violent behavior in many persons.
Violence is a voluntary act for causing pain and several damages to your self, or another individual or group of individuals. Biological factors are one of the main causes of violence. Genes such as the amygdale, personality disorders and brain damage create an aggressive attitude in people’s behavior.
http://law.jrank.org/pages/787/Crime-Causation-Biological-Theories-there-genetic-liability-violence.html
