The climate crisis is becoming a health crisis, exacerbating social and structural contradictions that affect health. Growing climate disasters exacerbate health inequalities, with dramatically disproportionate impacts across regions and social classes. This article explains that health and environmental crises occurred in the process of capital accumulation, and seeks a health justice theory to overcome the alienation of humans and nature. Health justice theory proposes to think of health as an issue that permeates all class relations in the changing capitalist system and calls for challenging the dichotomy that traps health within pre-determined social boundaries. In order to reveal the cause of structural inequality, it emphasizes the political nature of restoring the reality of the capital-spider that has disappeared from the health inequality discourse. The political nature of the health justice movement includes the possibility of multiple rights struggles by interdependent beings taking place around the globe, and aims for a hybrid community through the ‘ethic of cohabitation’.