Global supply chains have become a dominant business model that has generated millions of jobs in developing and emerging economies. At the same time, we do not know what is behind this rise, as well as the effects that purchasing practices between buyers and suppliers have on wages and working conditions. This book is the first to address the root causes of poor working conditions within global supply chains themselves, in terms of living wages, working hours, types of work contract, and health and safety, not only in the garment sector, but also in other sectors, such as food, electronics and furniture.From a unique survey among nearly 2,000 suppliers all over the world, this volume also presents fresh evidence on purchasing practices and identifies their impact on wages and working conditions. It is essential reading for all interested in promoting social sustainability, and reveals the modus operandi behind the rise of global supply chains, as well as providing evidence on both effects and root causes. The book will also help to close the circle by identifying changes in policies and practices that could lead to more decent wages and working conditions along more sustainable global supply chains.