I am afraid mankind is too poor and too stupid for this to happen in the nearest future (~100 years). We can't seem to resolve basic issues here on Earth, like

I am afraid mankind is too poor and too stupid for this to happen in the nearest future (~100 years). We can't seem to resolve basic issues here on Earth, like healthcare and education. We spend trillions on pointless wars while large portion of the planet population has no access to basics. Sorry for stating the obvious.