Are there continuities between Guernica and the strange, often agonized vision of humanity that Picasso had set forth over the preceding decade? How did Picasso’s distinctive set of concerns, which at moments seem dark to the point of despair, inform his final picture of women and animals in pain? Curators T.J Clark and Anne Wagner, along with Manuel Borja-Villel, director of Museo Reina Sofía, explain the key elements of the exhibition.