Is it safe?
Of the millions of asteroids that routinely fly by Earth, astronomers have so far detected only 10,000. __ Source
The chances are, we will not see it coming until it is right on top of us.
“This network has detected 26 multi-kiloton explosions since 2001, all of which are due to asteroid impacts. It shows that asteroid impacts are NOT rare—but actually 3-10 times more common than we previously thought. The fact that none of these asteroid impacts shown in the video was detected in advance is proof that the only thing preventing a catastrophe from a ‘city-killer’ sized asteroid is blind luck. The goal of the B612 Sentinel mission is to find and track asteroids decades before they hit Earth, allowing us to easily deflect them.” __ Ed Lu of the B612 Foundation
Conventional wisdom says that life goes on in a roughly straight-line extrapolation of current-day trends, with a few insignificant chaotic fluctuations here and there. The possibility of a serious discontinuity is relegated to science fiction and kook religions.
But wouldn’t it be better to assume that anything that can go wrong probably will go wrong, eventually? Rather than raising crops of incompetent psychological neotenates, wouldn’t it be more “resilient” to raise crops of multiply skilled, savvy, and responsibly dangerous progeny — just in case something really big should go wrong?
The likelihood of a catastrophic asteroid fall is very small on a short time scale, but grows to near certainty on a longer time scale.
Given current sociological trends of widespread decay, it is not certain that advanced technology-using humans will still be around to witness the next catastrophic skyfall. Fiction abounds with examples of how humanity might fall from its elevated perch. Galapagos by Kurt Vonnegut presents one whimsical scenario.
The motion picture Idiocracy is another playful portrayal of humanity going to the dogs. Ominously, the film’s portrayal of homo stupido is not so wildly out of line with what one sees in public these days.
What is the best way of dealing with semi-predictable and unpredictable discontinuities? Whether a world-spanning killer contagion, an electric power grid-collapsing electromagnetic pulse, an asteroid fall, a global nuclear war, or a collapse from debt and dysgenics, we should know how networks of resilient and dangerous communities — hidden in plain sight — might ride the storm until it is safe to re-ignite the spark.
These resilient and dangerous communities — R & D communities — could be considered nest eggs of humanity’s future. Baskets of nest eggs should be distributed widely in likely locations, to increase the long-term odds of success.
Creating networks of R & D communities does not require an act of the legislature. There is no need to wait for acceptance of the idea by academics, politicians, activists, journalists, or celebrities.
But nothing else demonstrates as firm a commitment to the human future.
al fin next level 
The fact that no one talks about the threat of cataclysmic asteroid strikes is a huge reason why I believe “climate change” is invented nonsense.
Asteroid strikes are real, have occurred in the past and we have no current way to stop one. It’s a matter of time before one hits and does huge damage – potentially civilization ending damage – yet there are no reports on the news about it, there aren’t giant budgets dedicated to finding them, etc. Why? Because it’s a technical problem with a technical solution (find asteroids, divert them). It would expensive so all the talk about how xxx only says that because Big ZZZZ funds them is moot.
Ultimately it demonstrates that the real driving motivation in what the progressive state and thought control apparatus pushes is power and not money. People come in and make money off of whatever the progressive state pushes for power but money doesn’t drive the progressive state.
I would like to give props to Mr. Dennis Cox who IMHO did a yeoman’s job of fleshing out what may have been the mother of all impacts experienced by the human race (Yiounger-Dryas event).
http://cometstorm.wordpress.com/
I am skeptical in regards to his theory regarding the formation of Carolina Bays but I think he is really on to something with the rest of his essay.
Playing devil’s advocate the fact that such hits are common, though they virtually all explode in the stratosphere, gives grounds for comfort. Where we are dealing with large numbers the laws of statistics are quite predictable and suggest the fact that we have not had a highly destructive hit within written human history, makes it unlikely we will have in the near future either.
I believe the worst we have had is the Burkle meteor which hit the south indian ocean about 2,800 BC which should have raised very destructive tidal waves but of which we have no record, even in legends.
It is still very well worth setting up a spacegoing civilisation, from which good observation of comet debris would be a spin off.