Helmut should know, Helmut are one.
But Helmut is not Stephen Hawking, who - Chris Clarke notes - suggests we put more human beings into space in order to save the species.
That's got 'tard crayoned all over it. We have a decent planet. We just need to manage it more intelligently. The Technological Substitutability view implied by Hawking is neoclassical nonsense.
Read Clarke's piece.