Herewith copy of my post to UMGF in a thread on the Everly Brothers, which may be relevant:

It has been explained thus:

All modern rock derives, to some extent, from the Beatles.

The Beatles often gave credit to the Everly Brothers as the source of their harmony sound.

Anyone who's ever heard the Louvin Brothers will notice how much the Everly Brothers' sound derived from them.

Ira Louvin is no longer with us, so it isn't right to pick on him.

Therefore: Charlie Louvin is the one responsible for modern rock music!

Peter.