Open doesn't always win - check out Tim Wu's book the Master Switch. It traces the history of telephone, TV, radio, film (and the Internet, though I haven't gotten there yet). Theodore Vail and AT&T essentially created a massive closed network and David Sarnoff at RCA/NBC did the same with radio & television. They eventually lost their grip on their monopolies, but the government was involved in both. While this isn't a perfect analogy, the imperialist nature of their founders sounds familiar :)

One interesting question: If Facebook and Twitter are NBC and CBS, who will be the cable provider for social networking?