If you rightly think it could be any of the following:
- climate change
- natural (or man-made) disasters
- war (especially the nuclear kind)
- another and-even-worse global pandemic
- economic inequality
- (read and weep at how much richer the richest 1% of the population became)
- the erosion of social support networks to help people deal with poverty, etc.,
- fill in the blank with anything I erronously forgot
you would actually be quite wrong, because according to too many folk the biggest threat to humanity right now is the miniscule portion of the population (less than 1%) who would like to use the bathroom that matches their gender identity.
Alternatively (complementarily?), it could also be the "woke mind virus" that saviour DeSantis (alternative name DeSadist) is determined to stamp out. Both in Florida, and if enough [insert noun here as any of mine would be both snarky and rude] vote the "right" way, the entire United States of America.
So, whatever issue you picked from the list above (you silly nincompoop), you obviously don't see what will REALLY be humanity's demise.
p.s. I'm working on a longer post, but thought I'd publish this right away to give you time to reconsider the actual cause of the upcoming doom and prepare accordingly. ;)