Technology has proved it can transform the world overnight — so why not be optimistic?

Is optimism just a crazy notion, or does technological innovation totally justify our faith? In the comments on our article about optimistic stories that could still come true, commenter Corpore-metal points out some of the ways that technology has transformed the world — even if we're never going to have a utopia. »10/27/11 2:40pm10/27/11 2:40pm