In 2001, Manuel Castells published an instant classic: The Internet Galaxy, Reflections on the Internet, Business, and Society. Re-reading it strikes you full force with the enormity of changes we've seen already, in the few years since 2001.
Here your are, in the age of World of Warcraft and Facebook, reading a text that analyzes role-playing chat environments and The Well as premier instances of social behaviour on the internet. Meet The Flintstones.
However, in other respects, Castells turns out to be a powerful visionary.