This report, submitted for a Psychology of Behaviour assignment at David Game College, delves into various psychological perspectives to understand human actions. It explores behavioral, social learning, humanist, psychodynamic, cognitive, and biological perspectives, analyzing their application in understanding criminal behaviour. The report examines research on group influence, conformity, and obedience, highlighting their impact on human actions. Furthermore, it outlines factors contributing to criminal activity, including biological and psychological theories. Finally, it discusses how psychological perspectives can be applied in public services, both by individuals and teams, to improve understanding and effectiveness in addressing complex societal issues. The report references specific case studies and theories to support its arguments.