I did a hard dive into the exhaustive syllabus at Supply Studies, which looks at the problem and discipline from every conceivable angle—logistics, media environments, critical theory, ecology, historical materialism, and on and on. It also links to resources for how to conduct your own investigation of the supply provenance of a particular good.
Which is a lot of associations to link together with all my other oddly varied headspaces. On this one I probably spent just as much time figuring out the shapes I wanted to cut.