I'm even tempted to say that it's our destiny. We're a lucky species, we've got the means to do it. If we all try to be all that we can be, there is no limit to what we can achieve.
Earth's resources are finitive, and it is a rather fragile biosphere. We simply need to find more resources, and possibly inhabit new worlds, if we want to ensure we can keep our jewel in the crown. If we can relocate our most dangerous, polluting industries to an already dead world, like the moon for instance, then it will be slightly easier for us to keep our homeworld in good shape.
Honestly, it's either embracing the new possibilities, or just remaining here on earth until our species inevitably dies out, with nothing of particular notice achieved whatsoever, like cattle.