Despite having been ignored for a long time, the relationship between mental health and social justice is receiving increased attention and the evidences of this relationship are beginning to influence the management of care services. In this lecture we will understand why the dominant paradigms in mental health care have ignored the influence of social inequalities in their work, probably because of their need to appear neutral applied sciences. We will then explore the relationship between mental health and social justice, to understand the mechanisms that mediate this relationship. Finally we will review the interventions at different levels, from clinical to public policies, which can contribute to the prevention of stress in the population. Although the extent of the issue will require several theoretical explanations by the lecturer, we invite students to bring their questions to class and facilitate a participatory environment.