In examining the evolution and definition of crime, criminology often aims to remove from this category acts that no longer conflict with society's norms and acts that violate the norms without imperiling society, although decriminalization of certain acts may be accompanied by attempts to enforce codes of morality (as, for example, in the response to pornography). Criminologists are nearly unanimous in advocating that acts involving the consumption of narcotics or alcohol, as well as nonstandard but consensual sexual acts (known among criminologists as crimes without victims) be removed from the category of crime. In dealing with crime in general, the emphasis has gradually shifted from punishment to rehabilitation. Criminologists have worked to increase the use of probation and parole , psychiatric treatment, education in prison, and betterment of social conditions.
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