Canada

Homo Sapien development and explotation of the planet resources will lead to extinction. No large scale extraterrestrial event is required.
Religious radicals in possession of nuclear warheads will hasten our demise. Combine that with the destruction of the environment leads to extinction.

Since 99.9% of all species on Earth to ever have existed are now extinct, the odds are not in our favor. Anyone thinking otherwise is being arrogant and willfully ignorant.

Attached, these aren't scientific papers, but interesting reading nonetheless.

Global HEATING due to burning trillions of tons of carbon, PLAYERS of weapons of mass destruction just ICHING to be used by some, and the destruction of our oceans, arable land, and diminishing water resources spell DOOM for our species.

It won't be now, but it won't last the next 500,000 years either.

https://www.independent.co.uk/news/science/will-human-species-become-extinct-fossil-record-asteroids-climate-change-a9516191.html

https://en.wikipedia.org/wiki/Human_extinction