Further, if "anomie" (the feeling one has when there is no longer any type of regulation or predictability in one’s life) is a primary cause of crime, there should be a theory to explain why only some working-class people commit crimes. According to Charles R. Tittle, anomie can be considered one of eight theories or schools that “ a negative association between socioeconomic status and the probability of criminal behavior.” But if there is evidence that some individuals and, in some cases, entire groups are alienated from mainstream society, there should be detailed research into the effect that this has on society as a whole (see normlessness). In such research, Marxism tends to focus on societal forces rather than the motives of individuals and their dualistic capacity for both right and wrong, moral and immoral. This can lead to a less comprehensive explanation of why people exercise their autonomy by choosing to act in particular ways. By comparison, in the sociology of deviance, Robert K. Merton borrows Durkheim's concept of "anomie" to form the Strain Theory. Merton argues that the real problem of alienation is not created by a sudden social change, as Durkheim proposed, but rather by a social structure that holds out the same goals to all its members without giving them equal means to achieve them. It is this lack of integration between what the culture calls for and what the structure permits that causes deviant behavior. Deviance then is a symptom of the social structure. Taylor et al. intend a combination of Interactionism and Marxism as a radical alternative to previous theories to formulate a "fully social theory of deviance".