Many pressing environmental and security threats now facing the international community may be traced to the frontiers. From climate change and cyber-attacks to the associated challenges of space weaponization and orbital debris mitigation, solutions to all of these issues have at their root some form of regulation over the 'global commons'. Yet governance over these spaces is now transitioning away from multilateral treaties to regional and bilateral accords. This book makes an original contribution by comparing and contrasting some of the principal issues facing the frontiers. It analyzes...