We do not have to wait for artificial intelligence. There are already processes and systems that give us what we want and need, namely people.

Black Death

What if a plague like the Black Death that killed 75 to 200 million people breaks out in our times?

Pandemics are real and they could totally wipe out our interconnected world.
A disease can be in all the major cities in the world within a few hours. And this is something our generation has to continue working on.