Tufts University Art Galleries presents author and poet Claudia Rankin for its spring semester Beckwith Lecture.  As everyday white supremacy becomes increasingly vocalized with no clear answers at hand, how best might we approach one another? Rankine, without telling us what to do, urges us to begin the discussions that might open pathways through this divisive and stuck moment in American history.  In her latest book, "Just Us," Rankine invites us to discover what it takes to stay in the…