Necessity is the mother of invention, and whenever we really need something, humans will find a way to have it.
That certainly seems to be the case with the Internet. There had to be an Internet sometime, because we, as a human species, have always had this deep desire to communicate, and to communicate over distance.
Thus, speech and language, our primary and oldest communication tools, have been with us since very early in our evolution. And, not long after, we developed written forms of communication, and began recording our thoughts and history on stone, papyrus, wood, cave walls, and any other means available. This is perhaps our primary activity as humans; in our essence we are communicating beings.