Eight theories of criminal behavior are selected for discussion based on their popularity, originality, and distinctiveness. They range from the traditional sociological theory (strain theory) to the classic psychodynamic theory (psychoanalytic theory) and the neo-biological theory (pathological stimulation-seeking). The author adds the theory of lifestyle criminality to these theories. The new theory borrows liberally from the theories reviewed. The theory of lifestyle criminality is presented in a series of postulates. It begins with interactive conditions of attachment, stimulus modulation, and self-image, followed by the evolving life decisions and cognitive features of lifestyle criminality. The cardinal postulate of the theory is that crime can be conceptualized as a lifestyle marked by four behavioral characteristics: global irresponsibility, blatant self-indulgence, interpersonally intrusive actions, and habitual violation of society's laws and rules. Equally important, however, are the choices made by the individual in the context of influential factors. Chapters examine the stages of development of the criminal lifestyle, cognitive patterns, and factors involved in the assessment and change of lifestyle criminals. Tables and 416 references