“…Aversion to the use of chemical weapons after the First World War has been similarly the subject of scholarly inquiry; as noted in a famous study of the history of violence, “it’s not immediately obvious why, out of all the weapons of war, poison gas was singled out as uniquely abominable—as so uncivilized that even the Nazis kept it off the battlefield” (Pinker, 2011: 274). Rationalist explanations primarily focus on the limited military utility of chemical agents and the logic of mutual deterrence (Ellis and Moon, 1984; Krause, 1991; Martin, 2004a; Martin, 2016; Chapman, Elbahtimy and Martin, 2018; Allison and Herzog, 2019). In contrast, genealogical explanations highlight the gradual emergence and institutionalization of the international norm against chemical weapon-use in world politics (Price, 1995, 1997; Bentley, 2013, 2014; Jefferson, 2014; Kovačević, Afrimadona and Claar, 2019).…”