After the revolution and Civil War, the large Burliuk family became divided—some members left Soviet Russia forever, while others remained in their homeland. The same happened with the family and wide circle of friends of Sonia Delaunay. Despite the seemingly closed borders, correspondence between the two families continued for years. The main theme of these endless letters was the debate between those who left and those who stayed—about the justification for fleeing, the fear of the future, and whether a particular decision was right or wrong. In his new book ‘Leave or Stay,’ writer and researcher Evgeny Demenok, drawing on previously unpublished archives, tries to reconstruct this correspondence and, once again, addresses a still-relevant topic.