Just spotted this Video from Nerdfighter Rebekah Austin:
It's part of the Exchanges Connect video contest, which I'd never heard of. Exchanges Connect is basically a social network for the whole world that was started, oddly enough, by the US State Department. It allows us not only to connect within our normal spheres, but also throughout the world to people whose lives are very different than ours.
It's, like, exactly what I would've done if someone wanted me to create a social network. It's all about defining "us" as everyone on the planet, not just people who we're similar to.