McLuhan, who coined the phrase "the medium is the message," predicted cultural changes decades before they happened. His original writing presents a mosaic of ideas, probes, and aphorisms.
This is the only collection of McLuhan's writings, speeches, and interviews that explicitly addresses the theological implications of media and technology. In some ways McLuhan, a devout Catholic, was doing stealth theology through his technological musings.
Postman focuses on the shift from a literate culture to an image-based culture and its impact on human development. Here he shows how the idea of "childhood," which emerged during the Enlightenment, is now on the decline due in large part to the advent of television.
Ong, a Catholic priest as well as a professor of humanities, shows how and why our culture is changing due to shifts in technology. He draws on anthropological research of oral cultures, literate cultures, and what he termed the culture of "secondary orality," or electronic culture.
Kelsey's book offers an excellent, practical, easy-to-read introduction and guide to the dangers and challenges facing teens in the land of social networking.