The post is about trying to figure out who popularized a particular myth, the myth that we have evidence that blues music started in the Yazoo-Mississippi Delta. And, basically, it seems that Alan Lomax did, starting in the 1940s and 1950s, and still actively in the 1980s and 1990s, but he had plenty of help from others.

Writers since roughly Charters 1959, while discussing blues origins, have often remembered to throw the Yazoo/Mississippi Delta a bone, choosing to throw that bone illogically rather than not throw it at all (Charters, Oliver, Palmer, Oakley, Gioia), because none of them could do so logically, because they had no actual evidence that blues music started in the Yazoo-Mississippi Delta. And, given when they were writing, it apparently only occurred to them to do throw that bone _at all_ (rather than throw that same bone to Alabama or wherever) because Alan Lomax had already popularized the idea that early blues music had a special relationship to the Yazoo-Mississippi Delta, an idea Alan couldn't support with evidence either, but liked the sound of as of about 1947, and as of about 1993.

In contrast, early writers interested in blues all bear the signs of not being influenced by or independently hitting on the same idea there as Alan did.