The Strain Theory of Deviance argues that social inequality, such as poverty and discrimination, can lead to feelings of frustration and strain, which can motivate individuals to engage in deviant behavior.

Merton identified five types of adaptation to strain: conformity, innovation, ritualism, retreatism, and rebellion. Conformity is the acceptance of both the goals and the means to achieve them. Innovation is the acceptance of the goals but the rejection of the means to achieve them. Ritualism is the rejection of the goals but the acceptance of the means to achieve them. Retreatism is the rejection of both the goals and the means to achieve them. Rebellion is the rejection of both the goals and the means to achieve them and the substitution of new goals and means.

Innovation involves accepting the goals but rejecting the means to achieve them. This can lead to deviant behavior, such as crime, as individuals seek alternative ways to achieve their goals.

Retreatism involves rejecting both the goals and the means to achieve them. This can lead to social withdrawal and isolation, as individuals feel that they cannot achieve their goals through legitimate means.

Rebellion involves rejecting both the goals and the means to achieve them and substituting new goals and means. This can lead to social change, as individuals seek to create a new social order.

Merton argued that the relationship between social inequality and deviant behavior is complex and varies depending on the context. He proposed that social inequality can lead to deviant behavior through various mechanisms, such as strain, anomie, and differential opportunity.

Anomie is a state of normlessness, in which individuals feel that the social norms and values are no longer binding or meaningful. This can lead to a sense of alienation and isolation, and can motivate individuals to engage in deviant behavior.

Differential opportunity theory is a theory that explains how social inequality leads to deviant behavior. The theory argues that individuals who are denied legitimate opportunities to achieve their goals are more likely to engage in deviant behavior as a means of achieving their goals.

Robert K. Merton is the primary theorist associated with the Strain Theory of Deviance. He developed the theory in his book 'Social Theory and Social Structure' in 1949.

In the Strain Theory of Deviance, strain is the term used to describe the gap between an individual's goals and the legitimate means to achieve them. This strain can lead to deviant behavior as individuals seek alternative ways to achieve their goals.

Assimilation is not a type of adaptation to strain identified by Merton. The four types of adaptation to strain identified by Merton are conformity, innovation, ritualism, and retreatism.

According to Merton, the primary function of deviance in society is to release social tensions. Deviance can provide a safety valve for individuals who are experiencing strain and frustration, allowing them to express their discontent without disrupting the social order.

The Strain Theory of Deviance has been criticized for being too deterministic, ignoring the role of individual agency, and using a narrow definition of deviance. However, it is supported by empirical evidence, which suggests that social inequality can lead to deviant behavior.

The main difference between the Strain Theory of Deviance and the Differential Opportunity Theory is that the Strain Theory focuses on social inequality as the primary cause of deviant behavior, while the Differential Opportunity Theory focuses on individual agency and the lack of legitimate opportunities as the primary causes of deviant behavior.

The Strain Theory of Deviance has been used to explain why crime rates are higher in poor neighborhoods, why crime rates are higher among minority groups, and why crime rates are higher among males than females.