One of the most pressing questions confronting the world is: how can we create a vibrant world economy that does not destroy the ecosystem on which it is based? The natural systems on which humanity depends are crumbling and business as usual will rapidly render much of the planet uninhabitable. An alternative must be found. This book describes a global economy that does not compromise the prospect of future generations. What should replace fossil fuels? How can a larger population feed itself? How can we satisfy material needs without causing pollution and resource depletion? While tackling these questions, the study also confronts the major political decisions that need to be taken, such as the ways in which tax systems need to be restructured to promote the shift to a sustainable society.