We can have both: space exploration and a more livable Earth. We don't have to choose. If you're serious about wanting to leave the planet, you should want the

We can have both: space exploration and a more livable Earth. We don't have to choose. If you're serious about wanting to leave the planet, you should want the planet to be able to sustain life long enough to allow for that to happen. It may be a couple of hundred years yet, or maybe less. I cannot see a path that allows for sustainable colonies in Musk's lifetime. We would have had to start thirty-forty years ago.