“I don’t even think about being an Indigo Girl unless I’m getting interviewed about it,” an upbeat Emily Saliers tells me, as she makes her daughter Cleo, eight, a peanut-butter-and-jelly sandwich. “I’m just, like, slogging through life,” she says, though not at all downtrodden, more in a relatable I’m-a-person-like-everyone-else sort of way. “Got sober–the most important thing that’s happened to me—got married [to Tristin Chipman in 2013], had a child. I’m making mistakes and learning from them. I’m working on my insecurities. I’m working on all the negative voices in my head that say I’m not good enough, just like everybody else.” In spite of the obvious influence on both music and culture, and the quiet inspiration for decades of positive change, she adds: “To be an icon, no–it’s incomp...