Is the Internet inevitable?
As a thought experiment, imagine an alternate universe—without the Soviet Union. Without the Cold War. Without the motivation to create DARPA. With no ARPANET project, and no backbone to connect to. With research on packet switched networks being distributed among a number of entities, some commercial. Would a unified set of protocols emerge, or would the network evolve as a set of "walled gardens" that are loosely connected and weakly interoperable?
On one hand, the benefit of a unified network for the users is tremendous. On the other hand, the short term interest of commercial entities often favors closed networks. Consider the mobile phone networks. Most of the world standardized on GSM, while the cellphone users in the United States are stuck with incompatible protocols. Recent events surrounding iPhone demonstrate how commercial interests are fighting with the users who want open networks.
If you were transported to the alternate universe, would you be able to convince its residents to build the unified Internet? What arguments would you use? This is not an idle question. In our universe, there is plenty of convincing to be done—for example, there is no consolidated repository for social networking data.
Maybe we shouldn't take the Internet for granted. If politics played out differently, we could indeed have "the Internets" instead of the single integrated network.