How did the internet evolve into what it is today?

It was originally meant to be a defense in times of war. Blow up a few computers, and the network still works, allowing out government to keep functioning. Then it became a tool for educators and scientists to communicate. Those college geeks eventually started playing games and sharing their lives. Once enough of them were doing it, the general population got on there. Once critical mass was reached, it was only a matter of time before commercialism crept on. However, the original intents of the government, the scientific community and the general population are still being met. The internet has grown; it has not abandoned.