The single greatest moment in human history, that particular kernel of time in which all of our best nature triumphed over all of our worst, was when we first set foot on the moon. The idea that we started as basic tool users at some point in our past, looked up into the sky, pointed at that thing overhead and said, "We are going there," is completely insane, and yet, we did that.
One of the primary themes of Christopher Nolan's highly-anticipated new film "Interstellar" is that we are in danger as a species when we lose our drive to explore. The film is set in a future where we have had to give our full attention to survival, when the idea of space travel is off the table completely. And while that seems extreme, considering the way the world felt when I was a kid living two hours from Cape Canaveral in Florida to the way it feels now, space travel has become something that is either about to be a novelty for the rich (maybe) or something that we do begrudgingly, and with as little financial involvement as possible. It's disturbing, frankly, and I would rather see the courage of every single person who puts on a uniform to fight for our country harnessed in service of exploration and making our species better than used to continue to fight over the diminishing resources of the rock we are currently anchored to.