Fascinating 1972 video (available from Google) which describes the creation of the Internet by the people who did it–even before it was called the Internet. They touch on the technology and social changes they envision.
I found the video sobering on two fronts. I was at university in 1972. First, despite (as I remember) these ideas being in the minority and controversial, they were right. Second, I remember discussions of these issues at late-night discussions in the dorm and I used equipment like that shown in the video.