In light of growing urgency in tackling the global environmental crisis, there is a need for new visions and strategies to ensure a more sustainable and just world. This book provides a comprehensive overview of Green perspectives on a range of global issues, including security, the economy, the state, global governance, development and the environment. Drawing on academic literature on Green political theory, combined with insights from real-world practice and the author's own extensive personal experience, it provides a timely and accessible account of why we need to embrace Green politics in order to tackle the multiple crises facing the world today. Presenting alternative visions and concrete strategies for achieving change, this book will be of interest to activists and policy-makers as well as students of environment, development and politics.