Dances with Gnolls
“The past century”. Also known as 0.05% of the lifespan of humanity.
Permanent settlements, aka cities, have only existed for maybe 8% of humanity’s time on Earth.
Humanity survives, the culture does not. We’re spread out enough now that no one disaster will doom all of humanity, but our foolishness has killed numerous civilizations in the past.
I can think of a few disasters on their own that could still wipe out Humanity. Don't count our extinction out just yet.