IF "zombie" means a hominid with reactions, but no considered-reasoning,
THEN all sorts of factions are manufacturing such right now, globally, in order that THEIR ideology/prejudice addiction gain supremacism, exterminating considered-reasoning AND all other factions.
The Great Filter.
All the different political/religious/cultural/ideological factions are just "makeup" on top of that fundamental difference.
Will Kahneman System-1 ( animal-reaction, programmed-reaction, conditioned-reaction, etc ) displace Kahneman System-2 from authority/power enough that the entire planet can be butchered & laid-waste?