Once upon a time there were few outlets for information. The world was explained to us by a handful of journalists who mostly got the inspiration from each other (shall we say copy?). We had a limited menu of views of the world, a leftist, a liberal and a right-wing. The world was easy to understand, we knew what was happening, since the important stuff was selected for us. Life was simple, few neurons were involved in making sense of the world. Yes that's a cartoon view but not far from how information was produced and consumed.