This article provides a critical analysis of John B. Watson's 1913 paper that introduced behaviorism as a new school of thought in psychology. It outlines the history of behaviorism and Watson's key contributions, such as advocating for objective study of behavior and rejection of introspection. The article also discusses criticisms of Watson's paper for not offering solutions and failing to acknowledge value in studying mental processes. Overall, the article analyzes Watson's impact on establishing behaviorism and its influence on fields like applied psychology, social psychology, and understanding psychopathology.