“Current studies showed that 30% of serial killers had mental health problems” (Hickey, 2010, p. Introverts are more likely to develop criminal minds than extroverts are. Most serial killers have been found to be quiet and introverted types of individuals. Mental abnormality or insanity that is responsible for criminal behavior cannot be detected through ordinary sanity tests such as the Durham and Brawner rules.There is concrete evidence that genes, which are encoded or defined by the DNA, determine certain traits such as skin color. Biologists have extended hereditary factors to include other abstract human traits such as aggression, sexual orientation, and personality. nature debate considers the existence of behavior genes, which influences people’s behaviors including criminality. nature debate is been ruled out as a source of criminal behavior for fear that people will use the theories to justify their criminality. The other controversial phenomenon related to the nature vs. nature debate is the dilemma of fraternal twins. According to the nature vs. nature debate, fraternal twins would have similar characteristics if environment does not play a role in shaping their behavior (Walsh, 2002). Thus, any pair of fraternal twins should have striking similarities in their behavior including their level of criminality. The hypothesis also suggests that twins would have similar behaviors despite having been brought up in different environmental and social conditions. However, this does not necessarily hold true since twins develop individual or personal behavior despite having closely related genetic factors.The fraternal twin phenomenon disqualifies the overall assumption of genes as the main factor that influences criminal behavior. This phenomenon forms the fundamental aspect of the nature vs. nature theory, which considers the environment as the main aspect that influences criminal behavior. According to Vila (1994), our behavior originates form the immediate social and physical environment. The author also tries to differentiate between a sociopath, psychopath, and primary psychopath. According to the author, other than their different definitions and explanations, psychopaths and sociopaths can be used to explain criminal behavior in relation to hereditary traits of criminology and acquired traits. There is a variation in measures of psychopath and sociopath among individual. A comparative
Earnest, N. (2000). The biology of culpability: Pathological identity and crime control in a biological culture. Theoretical Criminology, 4(1), 5-34.
Hickey, E. (2010). Serial murders and their victims. London: Cengage Learning
Maume, M.O., & Lee, M.R. (2003). Social institutions and violence: A sub-national test of institutional anomie theory. Criminology, 41(4), 1137-1171.
Vila, B. (1994). A general paradigm for understanding criminal behavior: extending evolutionary ecological theory. Criminology, 32(3), 311-359.
Walsh, A. (2002). Biosocial Criminology: Introduction and Integration. Cincinnati, OH: Anderson Publishing Co.
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