As UN Secretary-General, Dag Hammarskjold shaped many of the fundamental principles and practices of international organisations, such as preventive diplomacy, the ethics of international civil service, impartiality and neutrality. He was also at the heart of the constitutional foundations and principles of the UN. This tribute and critical review of Hammarskjold's values and legacy examines his approach towards international civil service, agency and value-based leadership, investigates his vision of internationalism and explores his achievements and failures as Secretary-General. It draws...