The Register John Perry Barlow: "I think I can safely say that history of the 21st Century is going to be about the struggle between open systems and closed systems, which was what you saw engaged on 11 September in a very pointed way," Barlow said. "This is going to be an interesting and complex struggle, because it is in the nature of open systems to breed closed systems, since for example, an open system like a free-market economy tends to gravitate toward a natural monopoly, which is a closed system."