My vote is on Viral or Technological, whichever gets to us first.
If it's viral, it will be from the overuse of antibiotics and such creating a nigh-unkillable pathogen that spreads fast and kills quickly. Bonus points if the virus causes zombification.
If it's technological, it won't be a robot uprising or anything like that, it'll be something like a massive solar flare crippling all the technology we depend upon. We'll all just wake up one day and nothing will turn on. Commence riots and mass panic.
If it's viral, it will be from the overuse of antibiotics and such creating a nigh-unkillable pathogen that spreads fast and kills quickly. Bonus points if the virus causes zombification.
If it's technological, it won't be a robot uprising or anything like that, it'll be something like a massive solar flare crippling all the technology we depend upon. We'll all just wake up one day and nothing will turn on. Commence riots and mass panic.