The realisation of justice in the real world requires moral principles and political action. This book offers a roadmap for these two notions to connect. It explains how action-guiding principles are formulated by seeking cross-disciplinary input. Also, it casts light on the concepts that occupy the space between political morality and real-world politics, which are often used as reasons to obstruct the progression of social justice, e.g. feasibility, fact-sensitivity, compliance and path-dependence. This book argues for a re-appropriation of these concepts in the name of justice. Many examples will be provided, but the book focuses especially on the case of climate change. It will offer a detailed case study on the realisation of climate justice.