By late 2015, the future of the Northern Irish peace process had once again been called into question. On this occasion the supposed threat to stability and peace came in reaction to the alleged involvement of Provisional IRA (PIRA) members in the murder of their former comrade Kevin McGuigan, in the Short Strand, Belfast on August 12, 2015.1 Many believe that McGuigan’s life was taken in retribution for the killing 2 months previously of another former Provisional, Gerard ‘‘Jock’’

of Business and Law at the University of East London. His book, The Origins and Rise of Dissident Irish Republicanism (2014), is published with Bloomsbury Press. John Horgan is Professor of Global Studies and Psychology at Georgia State University. He has over seventy publications on terrorism and political violence.