In the April–May 2015 issue of Survival, Bruce Gilley and David Kinsella explore the potential for states to coerce others into action on climate change; Charles D. Freilich explains Israel’s inability to win conclusive military victories; David A. Shlapak calls for a more modest US military strategy; Steven Pifer, Egon Bahr, Götz Neuneck, Lukasz Kulesa, Mikhail Troitskiy, Matthew Kroenig, Samuel Charap, Jeremy Shapiro and Maria Rost Rublee discuss the strategic dimensions of the Ukraine crisis; and Donald Holbrook and Vicken Cheterian delve into the relationship between al-Qaeda and ISIS.