This chapter focuses on Competency 3: Advance human rights and social, economic, and environmental justice within one’s field placement and beyond. It begins with a brief overview of the conceptual theories and frameworks for social justice. This is followed by an exploration of the types and sources of power, social locations, social constructions, social processes, social identities, conflicts, and the ways these concepts interact in relation to the field experience. The chapter then reviews visions and strategies for change. It explains Increased self-awareness; justice-informed engagement, assessment, and intervention; and justice-informed policy and systems advocacy. The chapter focuses on different concepts related to injustices at multiple levels. It describes how social justice calls for the fair and unbiased treatment of all individuals, eradication of discriminatory practices and institutionalized oppression, and establishment of equality for members of historically marginalized and oppressed groups.