Evolutionary Psychology: Violence

This is an evolutionary, psychological summary on violence, homicide, and war. The summary intends to help understand these behaviors. Violence is an act intended to hurt, injure, or kill. Both people and animals display violent behaviors. Violence is a present characteristic of every human society. Examples of violent crimes include rape, war, homicide and physical injuries. In the 20th century, roughly 87,500,000 people have lost their lives as a result of violent wars (Liddle 24). Drug abuse and mental disorders contribute to violent behavior. However, serious crimes like homicide and war get triggered by factors other than substance abuse and mental illness. Evolutionary psychologists have come up with an approach to psychology, Evolution Psychological Mechanism (Liddle 25). This approach explains that human brains have domain-specific mechanisms, which help in developing survival responses to their problems. The mechanism registers stimuli which processes the information and generates an action. Violence in animals is inevitable as predators rely on their prey for food. Scramble to feeding territories and scarce resources attribute to violence in animals (Liddle 26). There are two theoretical theories that explain violence in animals, sexual selection and parental investment theory. Sexual selection theory holds that selection affects not only the traits of survival but will also determine the reproduction potential. The theory operates on intrasexual competition and intersexual selection.
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