One way in which crime and deviance are social constructs is because of historical differences. Behaviours and actions that were once seen as criminal no longer are, such as homosexuality. Behaviours and actions that were once legal are now illegal, like using certain drugs.
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Another way in which crime and deviance are social constructions is because of cultural differences. Crimes are determined by the state, meaning that there are differences from country to country. Additionally, cultures will have different norms, meaning that deviancy will vary from culture to culture.