Today, Clark believes the elephants are upon us. Yes, the Internet has wrought wonders: e-commerce has flourished, and e-mail has become a ubiquitous means of communication. Almost one billion people now use the Internet, and critical industries like banking increasingly rely on it.

At the same time, the Internet's shortcomings have resulted in plunging security and a decreased ability to accommodate new technologies. "We are at an inflection point, a revolution point," Clark now argues. And he delivers a strikingly pessimistic assessment of where the Internet will end up without dramatic intervention. "We might just be at the point where the utility of the Internet stalls -- and perhaps turns downward."