This week on Opinio Juris, a guest post by Daniel Bethlehem, following up on a post by Julian Ku last week, offered three more legal bases for the legality of an intervention in Syria. Also continuing on some of last week’s themes, Kevin Jon Heller wrote how a recent decision by the ICC’s Appeals Chamber confirms his argument on retroactive ad hoc jurisdiction, and Deborah Pearlstein couldn’t resist taking apart Eric Posner’s Slate article on Jeh Johnson’s recent speech in Oxford. In another post, Deborah refused to read...