Singer-songwriters, guitarists, storytellers — and longtime friends — Pamela Means and Alastair Moock present “Race & Song: A Musical Conversation” at Next Stage Arts in Putney. The compelling performance uses music to guide listeners through an exploration of historic and current events, with a potent through line of race, class and gender. Familiar tunes such as “Wade in the Water” and “This Little Light of Mine” punctuate lived experiences, including personal narratives shared by the duo. The result is a safe space that allows for audience introspection and shared humanity to flourish.