[WizardAustralis]

It is all very well to quote Roosevelt and yes he is correct. But there is a difference between putting in the hard work and trying achieve something great, SpaceX have done that and will continue to do great things, and the difference between claiming a million people on Mars.

The thing is there are many folks out there that were the nay-sayers and were completely wrong but also many that were completely correct. They are typically not remembered. It is one thing to make bold claims, it is another to out right deny the realities of the universe because they get in the way of a vision.