I imagine many apocalypses.
For example, one where humanity's response to agricultural collapse is to nuke each other out of existence, leaving a dying planet to get boiled by the sun, 0% survival.
For another example, one where humanity's response to agricultural collapse is to work starving people to death building the machines that will help the billionaires survive.
For another example, one where humanity's response to agricultural collapse is to help the scientists cook the billionaires for food and build the machines that will help everyone else survive.
For another example, Fallout New Vegas but with mods.
