Company law has typically been seen as a dry and technical subject principally of interest only to the community of lawyers. Traditionally, its aim has been to create legal certainty for companies themselves in their relations with each other in the marketplace, and to define and combat corrupt, fraudulent, or other criminal acts by individuals using company structures to shield their behaviour. This book takes a completely different perspective, analysing how company law is being and can be used as a vital tool to combat new collective threats in the world, including climate change, social disintegration, and conflict. It is partly a response to the successes, but also the limitations, of movements towards corporate social and environmental responsibility in the past 20 years that have largely been pursued through a range of voluntary, soft law, and other initiatives kept strictly separate from those of corporate governance.