From Here There Are Blueberries, at the Barrymore Theatre. Photo: Matthew Murphy “I put blinders on and I focus in on the details,” an archivist at the United States Holocaust Memorial Museum tells the more junior scholar Rebecca Erbelding of how she gets through her work. “But,” Erbelding responds, asking about the Nazis and their collaborators, “isn’t that how they got through it? By compartmentalizing.” Her boss insists their subjects didn’t need to, because they thought they were doing something right and important. This exchange occurs midway through the stately and precise yet circumscribed investigation that makes up Moisés Kaufman...