Book excerpt: While the need for effective action toward a greener and socially inclusive economy has long been evident, health promotion in the context of sustainable development has faltered. Arguing that human health is the key factor to sustainable development, Development and Sustainability promotes a fresh, transdisciplinary approach to the eradication of extreme poverty. This ground-breaking book calls for new forms of cooperation which cross the traditional boundaries between social activism and science, and which are capable of harnessing the complex knowledge that such radical change requires. The contributions bridge the gap between those working for health and those working for sustainability science and the green economy, through developing the methodological and scientific means to deal with some of the most critical issues faced by humanity in the twenty-first century.