Discussions of international law often focus on questions of constraint and prohibition. This year's Annual Meeting considered the role of international law as an instrument. Actors on the international stage use a variety of tools to address their concerns, from climate change to economic development; from humanitarian crises to cross-border disputes; from commercial regulation to global trade. Governments and international organizations employ diplomacy and coercion, corporations use negotiation and persuasion, and non-governmental organizations engage in fact-finding and advocacy. And all of these actors affect and are affected by international law and use the international legal system to effectuate change and solve problems.