Most predictions of the end of mankind usually involve either a nuclear bomb or corpses rising from the dead(zombies). But how many have actually realized that those theories are both impractical and are partially based on video game logic? For starters, the cold war has died down a long time ago, and really the only country threatening to unleash Nuclear hell is the DPRK. And if there is one thing everyone knows about the DPRK, it's that their threats are usually empty threats. They know if they launch even one ICBM, the world would annihilate them one way or another.
Zombies or walking corpses on the other hand are really not that feasible. Reanimation in corpses is something which doesn't happen naturally. Anyone smart enough to reanimate corpses would also be smart enough to add an extra mind control function so they can at least control the living dead. That being said, humanity has come close to being wiped out in the past.
Throughout history, plagues have ravaged mankind, and we've darn near died out multiple times. Personally I've never imagined that plagues would one day destroy mankind, given how far medical science has come. Unfortunately for us, we found out nearly two thirds of the world's population was infected with a disease known as PAX-15, an extremely deadly bacteria. I was one of the lucky few who weren't infected. But that was due to the eternity serum, which prevented me from getting sick and dying due to natural causes.
