What is key to America’s understanding of class is the persistent belief—despite all evidence to the contrary—that anyone, with the proper discipline and drive, can move from a lower class to a higher class. We recognize that mobility may be difficult, but the key to our collective self-image is the assumption that mobility is always possible, so failure to move up reflects on one’s character. By extension, the failure of a race or ethnic group to move up reflects very poorly on the group as a whole.
— Michelle Alexander on discussion (or rather, abject lack thereof) of class in America. From The New Jim Crow (e-book, p. 20).