Mavis Staples has been celebrated by NPR as one of Americas defining voices of freedom and peace, and after 75 years of performing she is not showing any signs of slowing down in that mission. The last surviving member of The Staple Singers, Mavis reigns as both a Blues and Rock and Roll Hall of Famer and a civil rights icon whose impact on music and culture can not be overstated. Consider that Staples is a Grammy winner, Kennedy Center honoree, National Arts Awards Lifetime Achievement recipien...