I know my opinion isn't worth the 2 cents I'm giving it, but Rick has this one nailed. Everything that influenced Bill Monroe can be catalogued as can the roots of Scruggs style, but we have what seems to me, a relative rarity here. This is one genre that has its origin at one particular moment in time and place. What came before and after adds to the history and development perhaps, but the mating of the sound and style of Bill Monroe's music with the machine gun staccato of Earl Scruggs is the genesis of Bluegrass, the exact moment of its creation as a genre.Spaw