One could argue that he was the first to grasp and utilize the mass production and dissemination of the two dimensional image. Many of his pieces became popular icons immediately upon creation, and remain buried in the universal consciousness of the western mind.
I'd like to take a page, pun intended, from the Slow Movement and suggest "Slow Information," the ongoing inheritance of the 15th C. technology of Gutenberg. It's still going on, and not just at Colonial Williamsburg.
We can spread awareness of anything happening in the world, large or small. We may be able to prevent a negative outcome that could have arisen from help coming too late. And that can make all the difference.
I've been looking for lessons from history regarding social media, and found a nerd/policy wonk partnership that was enormously successful: Johanness Gutenberg invented mass media, via the printing press, but it didn't go anywhere for a while.