Re:1. To survive. ... ? (Score 2, Interesting)

Most people won't to see their children and their children's children and so on survive.

Then why do members of a family often live close together? According to the logic of the article they should spread to different continents to maximise their chance of survival. And they should not travel together. (Yes, I know that some parents actually do take different planes.)

I really do not care if there are humans in space in case of a catastrophe on earth.