The present trajectory of life on this planet is unsustainable, and the underlying causes of our environmental crisis are inseparable from our social and economic systems. The massive inequality between the rich and the poor is not separate from our systems of unlimited growth, the depletion of natural resources, the extinction of species, or global warming. Social and environmental movements require an orientation that is neither too narrow and short-term, nor too abstract and long-term to offer concrete guidance. Formulating the requirements for the flourishing of life in all its forms ? an ecological civilization ? will provide the roadmap that leaders need and will ground a hope that stimulates the necessary reforms.