>The internet was built on good will, fun, and generally good intent.
The main catalyst for the internet was the fear of nuclear war, as exemplified in this influential RAND paper from 1960 [0], which led to the investment in ARPANET. I'm not disputing good will and good intent, but I don't think fun had much to do with it.
[0] http://www.rand.org/content/dam/rand/pubs/papers/2008/P1995....