The actual realization of health justice is rooted on the causes and effects of ill-health, or health ontology as it’s been framed. A recent paradigm shift in health has been the raise of the social determinants of health, which gave substantial weight to perceiving health as more than absence of disease. It follows that justice in contemporary liberal societies must enact coherently with these social accounts through the inclusion of other strategies and actors. Nevertheless, predominant views of health are still based on individualistic causes of ill-health and healthcare-based solutions. The current dissertation explores the implications of excluding and including the social paradigm in health from the scope of social justice theories. Particularly, it clarifies what the role of civil society is in realizing health justice. It will cover this topic in three ways: 1. Evaluation of the predominant view in determinants of ill-health, particularly biologic endowments, behavioral risks and environmental exposure. This yields a better comprehension displacing social factors from health justice. 2. Analyses of contemporary political accounts of egalitarianism and its critiques. It will support and further deepen the arguments against displacing social factors, while guiding the scope of research towards the central role of civil society. 3. Once civil society and social factors are considered within health justice, I will explore related issues including social structures, social groups and identity. In sum, the incorporation of social factors in the ontology of health is fundamental to realize health justice. The social paradigm here envisioned refers to relationships in civil society that defines the preconditions for the flourishing of individuals. This is done through social positioning of entities, whether individuals or social groups. As such, integrating the social paradigm within justice implies a central role civil society; particularly, by shaping individual identity through social groups.