This document discusses the concept of self-fulfilling prophecy and how it may help explain criminality. It defines self-fulfilling prophecy as when one's expectations or treatment by others influences their own behavior. For example, if a person is expected or treated as if they will engage in criminal behavior, they may conform to this expectation. The document provides the example of a study by Rosenthal and Jacobsen where teachers' expectations affected students' IQ test performance and achievement. It also discusses a study of birth order names and arrest rates among the Ashanti people of Ghana, which could potentially be explained by self-fulfilling prophecy. However, it notes that self-fulfilling prophecy is difficult to prove as a cause of criminality