This issue contains three symposia covering important security concerns in the modern world. The first, a symposium on water conflict and economics, provides an overview of this topical issue as well as a range of case studies. The studies are written by Frederic Pryor, David Phillips, Marwah Daoudy, Rebecca Adler, Marius Claassen, Linda Godfrey, Anthony Turton, Alyssa Neir, Michael Campana, Marko Keskinen, Mira Kakonen, Prom Tola, and Olli Varis. The second is a symposium on trade and conflict and again provides an overview of the issues and literature together with a number of case studies. Our authors are Solomon Polacheck, Enrique Pumar, Prasad Bhattacharya, Dimitrios Thomakos, Archontis Pantsios, and Saumitra Jha.  The third symposium is on insurgency, occupation, and reconstruction and extends the journal's coverage of these issues. The authors are Christopher Coyne and Rupayan Gupta.