The author discusses to what extent a generally binding norm of social justice can be established in a modern, plural society. The book presents the difficulty associated with the preservation of plurality of different life forms. It also considers the plurality of the principles of social justice so as not to fall back to prioritization and the absolutization of their claims. This book argues for a more constructive way to search for criteria for complementarity, referring methodologically to Rawls¿ and Honneth¿s theories of justice. The author contents that the principles of social justice and their sources of normativity are plural.