Across its fairly short history, psychology has had several major theoretical movements. Perhaps the most important are Behaviorism, Gestalt Theory, Psychoanalytic and Psychodynamic Theory, Humanistic Theories, Attachment Theory, Sociobiology, Neurobiological Theories, and Cognitive Science. Some of these movements were natural outgrowths of earlier ones. Others were reactions against earlier approaches. Most contemporary psychologists do not limit themselves to any one theoretical view. Nonetheless, these movements have shaped psychology’s history and continue to influence contemporary psychologists’ orientation to research and practice. Thus, it is important to understand the major movements in the history of psychology to truly appreciate modern findings.