The book attempts to provide a roadmap for transition to a sustainable world from its current unsustainable trajectory. Unlike the 17-SDGs without the priority and interrelationship among the goals or more than 300 definitions of sustainable development; the book envisions a “Sustainable World” which is simultaneously safe, healthy and just. While providing a roadmap, the book discusses how a spiral of crises has emerged at the dawn of twenty-first century, in spite of showcasing miracles of science and technology. A systemic, precaution based and sustainable framework of governance is provided to address the complexity, uncertainty, ambiguity and diversity involved in the process of transition towards a simultaneously safe, healthy and just world.