In 2015 more than a million migrants and refugees crossed into Europe, most fleeing the war-torn region of Syria. The exodus is ongoing. Meanwhile, Donald Trump argues for a wall across the border of the US and Mexico, and closer to home Australia operates one of the harshest border policies in the world. How porous should borders be? Do nations have the right to refuse sanctuary? Are refugees collateral damage as the search for strategic long-term solutions to bloody conflicts stumbles on? Three Festival guests – Israeli strategic consultant Yossi Alpher, Medecins Sans Frontieres co-founder Jean-Christophe Rufin, and British Middle East expert Emma Sky parse the biggest humanitarian crisis since World War II. Convened by British philosopher Julian Baggini.