The Responsibility to Protect (R2P) is a major new international principle, adopted unanimously in 2005 by Heads of State and Government. Whilst it is broadly acknowledged that the principle has an important and intimate relationship with international law, especially the law relating to sovereignty, peace and security, human rights and armed conflict, there has yet to be a volume dedicated to this question. The Responsibility to Protect and International Law fills that gap by bringing together leading scholars from North America, Europe and Australia to examine R2P's legal content....

In 2011, the United Nations Security Council adopted Resolution 1973, authorizing its member states to take measures to protect Libyan civilians from Muammar Gadhafi's forces. In invoking the "responsibility to protect," the resolution draws on the principle that sovereign states are responsible and accountable to the international community for the protection of their populations and that the international community can act to protect populations when national authorities fail to do so. The idea that sovereignty includes the responsibility to protect is often seen as a departure from the...