I'm not familiar with all of these subfields, but I know that the scholarship on the history of communication networks is extremely deep. Why would there be so much work if things were actually explained so easily? If you are interested in these topics, go read the scholarship!
EDIT: With a little more clarity, I guess what I'm trying to say is that this is #1 on HN right now and I'd encourage people who are interested in this topic to read the mountains of scholarship on these topics written by experts and I wish that Tao had used his visibility to point readers at these experts. You may find that it complicates things.