Thanks for a thoughtful review. Over 20 years ago Neil Postman also raised questions over the impact of mass media on cognition, literacy and discourse presciently in 'Amusing Ourselves to Death' and later in books such as Building a Bridge to the 18th Century: How the Past Can Improve Our Future . It's good to see Siegel carrying on the tradition.
I don't think Postman was a Luddite, but he was a skeptic. Sadly, he's dead now. Most people are too busy buying into the technological determinism and hype that surround us to ask themselves the question he thought s/b raised about any new technological phenomenon, including the Internet. In the absence of thoughtful, reasoned discourse by the media and others in authority, each of us should ask ourselves in Postman's words: 'What does this technology do for me? What is lost and what is gained in terms of how it benefits or detracts from my daily life and what it means to be human?'
Incidentally, Marshall McLuhan is generally regarded as an advocate, if not celebrant, of mass media and the post-literate (tribal) world. I always thought so. However, an essay by Bob Rodgers in the Literary Review of Canada suggests his view was more ambivalent, viz:
'McLuhan was much misunderstood. He never promoted TV over books as popular accounts gave out. He never expressed a preference for tribal culture over individualism. He never said the patterns of perception imposed by the ear are superior to those of the eye. '