The one I'm kind of worried about that isn't quite extinction but, some kind of mass genocide where the wealthiest hoard resources to the point most of humanity

The one I'm kind of worried about that isn't quite extinction but, some kind of mass genocide where the wealthiest hoard resources to the point most of humanity dies from a lack of resources. It gets much worse than it is today if you factor in some kind of technology that replaces large swaths of the work force. And they create a military machine largely with out humans.