Strain Theory, proposed by Robert K. Merton, argues that social decay occurs when there is a discrepancy between culturally defined goals and the legitimate means to achieve them, leading to strain and deviant behavior.

Social Disorganization Theory, developed by Clifford R. Shaw and Henry D. McKay, posits that social decay is caused by the breakdown of social bonds and the weakening of social institutions, leading to increased crime and other social problems.

Social Control Theory, proposed by Travis Hirschi, argues that social decay is prevented by strong social bonds, clear norms, and effective sanctions, which deter individuals from engaging in deviant behavior.

Symbolic Interactionism, associated with George Herbert Mead, emphasizes the role of social interactions in shaping individual behavior. It suggests that individuals contribute to social decay through their interactions with others, particularly those involved in deviant activities.

Cultural Conflict Theory, proposed by Thorsten Sellin, argues that social decay occurs when different cultural groups come into conflict, leading to tension, prejudice, and discrimination, which can contribute to social problems.

Social Learning Theory, developed by Albert Bandura, posits that individuals learn deviant behavior through observation and imitation of others, particularly those they perceive as role models or peers.

Labeling Theory, associated with Howard Becker, argues that social decay can occur when individuals are labeled as deviant, which can lead to stigmatization, discrimination, and further deviant behavior.

Differential Association Theory, proposed by Edwin H. Sutherland, suggests that criminal behavior is learned through association with deviant peers, who provide opportunities and reinforcement for criminal activities.

Conflict Theory, associated with Karl Marx, argues that social decay is rooted in social inequality and the struggle between different social classes for power and resources, which can lead to exploitation, oppression, and social unrest.

Social Bond Theory, proposed by Travis Hirschi, suggests that strong social bonds, such as those with family, friends, and community, deter individuals from engaging in deviant behavior.

Anomie Theory, developed by Emile Durkheim, argues that social decay can occur during periods of rapid social change, when traditional norms and values are disrupted, leading to a sense of normlessness and increased deviance.

Social Learning Theory emphasizes the role of observation and imitation in the transmission of deviant behavior. Individuals learn deviant behaviors by observing and imitating others, particularly those they perceive as role models or peers.

Institutional Anomie Theory, proposed by Robert K. Merton, suggests that social decay can occur when social institutions fail to provide legitimate opportunities for individuals to achieve socially valued goals, leading to strain and deviant behavior.

Labeling Theory argues that labeling individuals as deviant can create a self-fulfilling prophecy, whereby the label leads to discrimination, stigmatization, and further deviant behavior.

Cultural Transmission Theory, associated with Richard A. Peterson and Albert L. Mullins, suggests that social decay can occur when cultural values and norms that promote deviance are transmitted from one generation to the next.