High Frontier places a bullet-proof vest on our bare chest. High Frontier is as non-aggressive as a bullet-proof vest. There is no way to kill anyone with High Frontier - all that High Frontier can do is to keep others from killing us.
Robert A. HeinleinBut space travel can't ease the pressure on a planet grown too crowded not even with today's ships and probably not with any future ships-because stupid people won't leave the slopes of their home volcano even when it starts to smoke and rumble. What space travel does do is drain off the best brains: those smart enough to see a catastrophe before it happens, and with the guts to pay the price-abandon home, wealth, friends, relatives, everything-and go. That's a tiny fraction of one percent. But that's enough.
Robert A. Heinlein