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The goal of criminological theory is to help one gain an understating of crime and criminal justice. Theories cover the making and the breaking of the law, criminal and deviant behavior, as well as patterns of criminal activity. Individual theories may be either macro or micro. Theories can be used to guide policy making and can be evaluated on several criteria including: clarity, scope, parsimony, testability, practical usefulness, and empirical validity. This includes crime and human nature, race IQ and crime the diversity of types of crime, etc. Crime and human nature dealt with Wilson and Herrnstein. They argued that a link exists between an individual’s decision to commit a crime and biosocial factors such as low intelligence, mesomorph body type, having a criminal father, impulsivity, and having an autonomic nervous system that may drive one to commit a crime.
Race and IQ involves contemporary research also suggest racial and ethnic differences exist in offending behaviors. Studies have shown that minority groups are more likely to engage in delinquency and crime compared with their white counter parts. Bio criminologist argue that all criminals are predisposed to crime this would require that social scientist remain objective and vigilant in their study of offenders. This is revealed in research that relies on samples of inmates in jails, prisons and juvenile detention centers. To suggest that biology can explain or predict crime without examining all types of crime is responsible and arguably ignores the true sources of cause of crimes and delinquency.