Downvote all you like but... it won't make us "more likely to survive"
Imagine some example probabilities for a second. Just as an example.
You have a perfectly good bus, fully serviced and no dents. With 100 people on it. It's got a 99% safety rating, and we want to make sure no one dies from a blow out, and it does not have an engine fault.
To cover that 1%, we pack 15 people into a broken shed on wheels, with a 0.5% safety rating. Now is our "survivability" greater or less than before?
The entire population, of people sitting in vehicles, has better chance of survival should *one* of those break. However, in total, for each individual, we have lowered the chance of survival on average (as we almost certainly will have a shed failure).
Living on Mars, and Mars survival rating for an asteroid, IMO is much much less than on earth. So going to space would not solve the problem, mainly as Mars will be in need of help from earth for the foreseeable future (100s or 1000s of years?). Until you terraform (1000s to millions of years?) you are increasing risk, not reducing.
(In response to those saying getting off this rock helps our survival. It helps knowledge, but not necessarily survival)
Biting the hand that feeds IT
