The Living Force
I feel the same way. Saying humanity will either evolve or die off is a big either-or scenario, with a million possibilities in between. And as people have said, we choose every day whether to evolve or just be mechanical (same as choosing extinction). That scales up to our extended networks, communities, and whole countries. Maybe some countries insufficient numbers of people refuse to stand up to evil, as it happened in Nazi Germany or the Soviet Union. Even then, there were those who fought back covertly, or who chose to leave the country (such as the author of Defying Hitler) and so step out of the way of the juggernaut.I see the idea of collective fate here. What about a series of individual fates aligned in different directions with different outcomes? Are all sentient beings on earth collectively humanity or is humanity a subset of the menagerie of characters who have physical bodies? Does the fractured soul unit really include everybody here on earth? Certainly not the OPs. What about the Kantekkians? What about the intermingling of all the disparate groups?
It is a complex kettle of fish.
Then there's the people who are incarnating on this earth now, or relatively recently, knowing full well the cataclysms and upheaval on the way. Maybe the increase in comets and cosmic rays will do the right thing to those with the receiving capacity? They were made for this world. And so were we. I'm squarely in camp A on that account. There will be people who survive and rebuild, even if it's millennia after something big happens. And they will be far stronger for having braved that bottleneck.
I may die when a meteor hits my apartment, an earthquake hits, or a plague comes, or I wander through an unlucky ally and get shanked for drug money. There's only so much we can control, but making the choice to be aware and act wisely and virtuously every single day sends signals out to the universe that there is still a WILL and some fight left. No effort spent on The Work is ever wasted, or so I think. :)