For too long, it was his subjects who were invisible. They are American roots musicians, many of whom were “ignored in their communities for decades,” which prompted Mr. Duffy to step in and help. In 1994, he founded the Music Maker Relief Foundation, which helps them cover basic living expenses as well as promote and develop their careers. By helping them, the foundation has also preserved the work of these musicians, who are the living history of American music’s foundation. Read more here.