Great vid... Though technically, if 'doomsday' comes... 'the end of the world'... there's no one left to say 'see, I told you so'... And it isn't darwinism that decides, nor are we getting smarter...
What it is is that those who live closely attuned to natural cycles are more likely to be prepared, and more likely to survive., due to a skill-set more in tune with nature than a man made environment.
For instance, where I am from, virtually everyone has killed and eaten something many, many times - an act that many city folks just can't even wrap their mind around, considering it cruel and inhumane. They will be beginning from a point that I learned long ago, when I was about eight.
And after mustering the wherewithal... the desire, which hunger will soon provide, then comes the lessons in ability - It really doesn't matter if you want to kill prey, you still have to know how to find it, and hunt it down, and assuming a kill (which is still assuming a whole lot), how to butcher and preserve the meat... And how to do it again and again, and again, without fail.
This - among the most basic of lessons - will quickly be made apparent as TRUTH becomes reality, even in the most recoverable of catastrophic events.
When those events happen, it's the folks that live hand-to-mouth, that lived within the means of the land, that suddenly become powerful.
So it isn't even a matter of survival - Most city dwellers won't even get to the gate. The fight for survival will begin long after they're gone.