Cycle of abuse is the name of a theory that was developed to explain certain patterns in an abusive relationship, and in domestic violence. Lenore Walker developed the theory in the 1970s, after she had observed that there is a pattern that repeats in such relationships:
Walker's cycle of abuse theory was regarded as a revolutionary and important concept in the study of abuse and interpersonal violence. However, researchers have occasionally criticised Walker's methodology, preconceptions or findings.