This report explores the psychology of behavior, examining various psychological perspectives such as biological, psychodynamic, behavioral, cognitive, and humanistic approaches, and how they influence human actions. It delves into theories of criminal behavior, considering social, psychological, and biological factors. The report further investigates how psychological perspectives, including trauma-informed practices, are applied within public service contexts, providing insights into the complexities of human behavior and its implications for societal structures. The report references the 'Beyond Youth Custody' program to illustrate practical applications of these theories and perspectives. The document is contributed by a student to be published on the website Desklib. Desklib is a platform which provides all the necessary AI based study tools for students.