Unfortunately I believe the rise of the fourth economic stage, an information based economy, has turned the US into a uncomfortably divided state, just as you d

Unfortunately I believe the rise of the fourth economic stage, an information based economy, has turned the US into a uncomfortably divided state, just as you described. The red tribe not only doesn't know any blue tribe members, but also only reads red tribe books, and watches red tribe television, and vice versa. Simply because there is a big enough market for it to exist and be profitable, the American people are divided in thought (at least with the information they consume, which eventually does lead to thoughts).