Chapter 8 of The Survival Imperative: Using Space to Protect Earth discusses the need to use space to protect civilization and the planet. In this extract science scholar and historian William E. Burrows writes that:
The issue is about increasing planetary protection to ensure that no matter what happens, gradually or suddenly, civilization has the means to evade annihilation and survive. The overwhelming majority of boats do not run into emergencies and sink, but no boat owner in his or her right mind would put to sea without a fire extinguisher, a lifeboat, and insurance. Similarly, most homes do not burn down, but those who live in them safeguard precious papers and other things in safe deposit boxes.This chapter - available online - is worth a read...
That being the case, it is time for responsible individuals and groups everywhere to take Earth for the ship it is and begin a fundamental, evolutionary, strategy to maximize its chances for survival. It is time to come up with a very long term plan because the multiple dangers and the means of salvation are coinciding.