Social work is a professional discipline and practice that aims to enhance the well-being of individuals, families, groups, and communities by addressing social problems and promoting social justice. It combines knowledge from social sciences, psychology, sociology, economics, law, and public administration with practical skills to help people overcome challenges and improve their quality of life. The origin and development of social work as a profession reflect its transition from charitable activities and voluntary services to a scientific, organized, and professionally managed field. A critical examination of its nature, characteristics, philosophy, and scope reveals its significance as well as the challenges it faces. The nature of social work is both scientific and humanitarian. It is scientific because it relies on systematic knowledge, research, professional methods, and evidence-based interventions. It is humanitarian because it emphasizes compassion, empathy, dignity, and respect for human rights. Social work is preventive, developmental, remedial, and rehabilitative. It seeks not only to solve existing problems but also to prevent future social issues and promote the overall development of individuals and society. It is dynamic in nature, adapting to changing social, economic, cultural, and political conditions. Social work is also interdisciplinary, drawing knowledge from various disciplines to understand and address complex human problems. One of the major characteristics of social work is its professional orientation. It requires specialized education, ethical standards, practical training, and continuous professional development. Another important characteristic is its person-in-environment approach, which recognizes that individual problems are often influenced by family, community, social institutions, and broader societal structures. Social work also