The `corporate social responsibility` (`CSR`) movement has been described as one of the most important social movements of our time. This book looks at what the CSR movement means for multinationals, for states and for international law. International law is often criticized for being too `state-centred`, and ill-equipped to deal with the challenges of globalization. However, drawing from many and varied examples of state, NGO and corporate practice, this book argues that, while international law has its limitations, it presents more opportunities for the CSR regulation of multinationals than many people assume. The main obstacles to better regulation are, therefore, not legal, but political.