We're one killer global war / pandemic / etc away from extinction
Being on multiple planets (and eventually multiple solar systems) prevents a species from going extinct if something catastrophic happens to their home world
Being on multiple planets (and eventually multiple solar systems) prevents a species from going extinct if something catastrophic happens to their home world
No, we're not. And whatever we end up doing to the Earth, it's still going to be vastly more suitable for human life than anywhere else in the solar system.
If you care about preventing extinction, stop looking at the stars, and start digging bunkers. Or building undersea cities, or whatever.
As even that specific nerd is also doing a big project to reduce environmental damage, this isn't an "either/or", it's an "and".