As President of the International Court of Justice, Dame Rosalyn Higgins is the world's most senior Judge. This two volume set collects together all of her most important writings as a scholar, a member of the UN Human Rights Committee, and as Judge and President of the International Court of Justice. During these years, she has written on a wide range of topics including legal theory, United Nations Law, humanitarian law, the use of force, state and diplomatic immunities, human rights, and natural resources law. As President and Judge of the International Court of Justice Dame Rosalyn has played her part in the formulation of the Judgments and Opinions of the principal judicial organ of the UN. She has sought to ensure the ICJ - the senior international court - operates in a modern and efficient manner, and in cordial relationship with the many new courts and tribunals now existing. These aspirations are reflected in her speeches during the years 2006 to 2009, most of which have not hitherto been published. This volume contains a comprehensive collection of all her Separate Opinions, amongst other writings, divided into ten Parts by subject matter. This includes specially written introductory passages by Dame Rosalyn to present the catalogue of her writings and the correlative developments in international law by theme.