It’s easily the most useful diagram I’ve found for understanding the practice of journalism in the United States, and the hidden politics of that practice. You can draw it by hand right now. Take a sheet of paper and make a big circle in the middle. In the center of that circle draw a smaller one to create a doughnut shape. Label the doughnut hole “sphere of consensus.” Call the middle region “sphere of legitimate debate,” and the outer region “sphere of deviance.”
That’s the entire model. Now you have a way to understand why it’s so unproductive to argue with journalists about the deep politics of their work. They don’t know about this freakin’ diagram! Here it is in its original form, from the 1986 book The Uncensored War by press scholar Daniel C. Hallin. Hallin felt he needed something more supple—and truthful—than calcified notions like objectivity and “opinions are confined to the editorial page.” So he came up with this diagram.