"There are good reasons for restrictions on all manner of state and non-state weapons. Keeping the most destructive tools out of the hands of the most violent agents is a reasonable goal prima facie. I do not want to focus exclusively on firearms, let alone their strange, troubled regulatory history in the US. My point is broader and gets at the rational animal who creates and deploys the tool. The trend of rising gun affordability illustrates a central point about human nature and the moral plasticity of technology — our tools are shaped by our intent, and in their use and creation, they shape us."