It's inevitable that humans will become one race, global. You see the beginnings of it today, especially in bigger cities where kids from several generations of mixed race end up looking like one race, humans.
Remember, less than a hundred years ago we thought there were Martians or other creatures close by in the sky watching us. Now we know the solar system is ours for the taking.
In spaceflight we work together and achieve a common goal: Go to the Moon, bring Skylab back to Earth. Today we get distracted by clicking on gossip sites and taking selfies, because the technology is still new, but once we start really living on those bandwidths, communicating globally, it will change humans.