Social work is an academic discipline and practice-based profession concerned with meeting the basic needs of individuals, families, groups, communities, and society as a whole to enhance their individual and collective well-being. Social work practice draws from areas, such as psychology, sociology, health, political science, community development, law, and economics to engage with systems and policies, conduct assessments, develop interventions, and enhance social functioning and responsibility. The ultimate goals of social work include the improvement of people's lives, alleviation of biopsychosocial concerns, empowerment of individuals and communities, and the achievement of social justice.

Social work practice is often divided into three levels. Micro-work involves working directly with individuals and families, such as providing individual counseling/therapy or assisting a family in accessing services. Mezzo-work involves working with groups and communities, such as conducting group therapy or providing services for community agencies. Macro-work involves fostering change on a larger scale through advocacy, social policy, research development, non-profit and public service administration, or working with government agencies. Starting in the 1980s, a few universities began social work management programmes, to prepare students for the management of social and human service organizations, in addition to classical social work education.

The social work profession developed in the 19th century, with some of its roots in voluntary philanthropy and in grassroots organizing. However, responses to social needs had existed long before then, primarily from public almshouses, private charities and religious organizations. The effects of the Industrial Revolution and of the Great Depression of the 1930s placed pressure on social work to become a more defined discipline as social workers responded to the child welfare concerns related to widespread poverty and reliance on child labor in industrial settings.