A mere seven years after my graduation day, I had failed on an epic scale,” JK Rowling made a confession at a commencement speech at Harvard in 2008. “An exceptionally short-lived marriage had imploded, and I was jobless, a lone parent, and as poor as it is possible to be in modern Britain, without being homeless,” said the celebrated author of the Harry Potter book series. “The fears that my parents had for me, and that I had for myself, had both come to pass, and by every usual standard, I was the biggest failure I knew.”