Why do humans go into space?
The succinct answer is: because they’re human.
That’s what we humans do. We explore, move on, advance, learn, expand, develop, grow. We do it to find out what’s there, and what it’s like, and to see what we can do with it and how we can handle it. Pioneers are pioneers because they want to get away from the old and build something new, and figure it’s worth the risk that comes with living on the fringe.
All other explanations are just spin-offs of that basic, fundamental human trait called curiosity.
But the spin-off explanations are worthwhile, too. The potential economic benefits are quite literally incalculable. An entire solar system filled with raw materials? Kinda makes the industrialization of North America look like a kid playing in a small sandbox. Energy in virtually unlimited amounts, free for the taking. Aluminum, iron, copper, hydrogen, water - all just waiting to be harvested.
Yeah, yeah - getting them won’t be cheap. It’ll be a century or more before we have an efficiently operating space-going culture. So what? Pulling our heads into our shells like a race of tortoises isn’t going to get us there any faster. The only way to develop the technology is to do it, starting with the baby steps we’ve been taking. And yeah, I’ve heard the “robots can do it better and with less risk” folderol. Twits who’ll ride a greased board down a sheer mountain face at seventy miles an hour will sit in a bar that night and pontificate on the “unnecessary risks” of people going into space. The point is, humans take risks, and don’t mind doing it, because we want to explore, move on, advance, learn, expand, develop, grow. We like the thrill. And sooner or later, we’ll want elbow room. We might as well start learning how to get there now, so in a century or two, we’ll be ready and able to do it.
A previous poster mentioned Columbus, and the metaphor is worthwhile. It’s easy to sit here in the 21st century and say “Columbus was a dope! He should have just waited until somebody invented trans-Atlantic jets and ocean liners, and then he wouldn’t have had to take those foolish risks.” But progress doesn’t just happen; we have to make it happen, one dangerous step at a time. The risks that Columbus (and Magellan, and countless other explorers) too were necessary steps in getting us to the point where we can now cross oceans like hopping mud puddles.
Why do we go into space, Cecil? Because we’re humans, not tortoises. And most of us like it that way.