Technological change is often identified as a major possible cause. Anxieties about the disappearance of the book, as well as the novel, have been common throughout the 20th century. Henry Kannberg sees the post-Gutenberg age as being one where the entire morphology of literature may transform as a result of 'hyper-literacy' and the exponential abundance of texts. He argues that there may be a rebirth of the novel, or the birth of a descendant to it. Similar observations were made by Marcus du Sautoy who argued that technology allows for changes to books and novel-writing that are only just beginning to be explored.