Prison is quite literally a ghetto in the most classic sense of the word, a place where the U.S. government now puts not only the dangerous but also the inconvenient-people who are mentally ill, people who are addicts, people who are poor and uneducated and unskilled. Meanwhile the ghetto in the outside world is a prison as well, and a much more difficult one to escape from than this correctional compound. In fact, there is basically a revolving door between our urban and rural ghettos and the formal ghetto of our prison system.