How will emerging technologies –including drones, artificial intelligence, genome editing, additive manufacturing, and cyber warfare –affect international security? Will these technologies shape when and how states use military force? How do states develop these technologies, and how do they diffuse? Specifically, what obstacles do statesface when acquiring these technologies and incorporating them into their arsenals?What ethical and legal quandaries do decisionmakers confront when contemplating the development and use of new military systems? Drawing from scholarly research and the latest policy debates, we will explore how new technologies impact the security environment of the world in which we live.