The document summarizes the history and origin of psychiatric social work. It begins with a brief overview of the history of psychiatry from ancient to modern times. It then discusses the origins of psychiatric social work in the context of deinstitutionalization in the 1800s-1900s and the role of social workers in assisting former patients transition back to their communities. The document also notes the expansion of psychiatric social work during World War I to help soldiers experiencing shell shock. Finally, it discusses the development of psychiatric social work in India beginning in the 1930s-1940s and the establishment of training programs and professional associations to support the field.