Since you invited opinion, it is mine that bluegrass has no place in the "anthemic" scheme of things. C'mon, all the best bluegrass tunes are either murder ballads or songs about not getting along with someone, be it over land or love (with the distinguished exception of the above-mentioned Uncle Pen). So let's appreciate it for what it is (or was), a bunch of gnarled countryfolk singin the cut-time blues.