That's exactly what I tried to imply when saying the above as succinctly as possible.
I realize "The Blues" isn't African but African American and everything that entails.
It hails back to the "old world" in certain ways but it's evolution and sonic qualities are
distinctly African American. And as you stated the 12 Bar Blues structure and Swing are
defining characteristics of Blues and would go on to be a structure maintained in Jazz until
this day.
Much respect !
Right, it's hard to explain that when you hear them heavy swinging basslines in our music you KNOW that this is some "black" sounding music even though it ain't "african" in origin, cuz at the same time it's certainly way outside the culture of white/european/western as well and represents the particular black american sensibility and expression to a tee.
There are many other examples of this in black american music and culture, but the 12 and swing are probably the most obvious staples.