Social Work is both an academic discipline and profession that concerns itself with helping individuals, families, groups and communities enhance their social functioning and overall well-being. Social functioning refers to the way in which people perform their social roles, and the structural institutions that are provided to sustain them. Social work is underpinned by theories of social science and humanitites and guided by principles of social justice, rights, collective responsibility, and respect for diversity, social work engages people and structures to address life challenges, socioeconomic development, social cohesion and enhance well-being. Their engagement with client systems create changes and with communities they may bring about social change. Social work practice is often divided into micro-work, which involves working directly with individuals or small groups; and macro-work, which involves working communities, and within social policy, to create change on a larger scale.