As part of the campaign, it published a special report providing a comprehensive overview of statelessness and delving into the human impact of the phenomenon. It also published an open letter addressed to states, urging them to take action. In addition to UNHCR High Commissioner António Guterres, the letter was signed by Angelina Jolie, a UNHCR special envoy; Surin Pitsuwan, former secretary-general of ASEAN; Shirin Ebadi, a Nobel Peace Prize laureate; Archbishop Emeritus Desmond Tutu; Barbara Hendricks, a UNHCR honorary lifetime goodwill ambassador; Madeleine Albright, former US secretary of state; Carla Del Ponte, former chief prosecutor of two UN international criminal tribunals; Zeid Ra’ad Al Hussein and Louise Arbour, former UN high commissioners for human rights; and Dame Rosalyn Higgins, former president of the International Court of Justice, among others.