Lack of knowledge=tragedy?

Postman attemps to tell us that we are falling so far away from typography that soon anything will be entertainment for us. We won't listen or care about anything and we won't have any valuable knowledge. Typography is falling away as our main way of communication and Postman makes the point that eventually this will lack of knowledge will end in disaster.  This information is revealed in the last paragraph of chapter 11 when Postman makes a distinction that is similar to that of Aldous Huxley's point in "Brave New World." He tries to make the point that we will become so uneducated that we will want entertainment in anything and everything till we end up literally "Amusing Ourselves to Death".