I never said it would be easy. Life changes. Human life before the Industrial Revolution was considerably different than now. Birth rates would have to fall.

I never said it would be easy. Life changes. Human life before the Industrial Revolution was considerably different than now. Birth rates would have to fall. We would have to find ways to support more of us on fewer resources. Major sacrifices and changes in lifestyle would be absolutely required. Our species as it is now would likely not survive such a transition. But, as Carl Sagan said: "It will not be we who reach Alpha Centauri and the other nearby stars. It will be a species very like us, but with more of our strengths and fewer of our weaknesses."