In an interview Elon Musk was saying something like that … the most powerful thing we can do is to travel through space, explore it and colonize Mars…
Well, Mr. Musk, I have to correct you: the greatest (the most powerful, if you want to call it that way) thing we can do is to solve the hunger problem we still have on our planet. Second greatest thing is to facilitate free access to education to all kids and people on the planet.
AFTER THAT, and only after that, everything else (world peace, world harmony, space exploration, etc etc etc) will come almost for free.
I dare you! Can you imagine that Mr. Musk?