Ghosts, Vampires and Zombies in Irish Theater and Literature

From the spirits and banshees of oral legends to Bram Stoker's Dracula, from the classic works of Yeats, Synge and Beckett to Garth Ennis's Preacher comics and Anne Rice's Vampire novels, Irish culture has been haunted by the Otherworld. Why has the Irish Gothic had such a long ghostly afterlife on page and stage? Can we learn something about modernist works like those of Yeats and Beckett by seeing them through the perspective of popular fictions of the supernatural?