It really isn't.
Lower cognition is strongly associated with dissatisfaction and violence, not to mention much lower economic productivity (less taxes!).
Lower cognition is strongly associated with dissatisfaction and violence, not to mention much lower economic productivity (less taxes!).
If a society is making 400 widgets it doesn't matter whether each is priced at $2 or $999, the government will only be able to get 400 widgets.
A stupider population makes much less widgets.
dissatisfaction and violence are the easiest problems for a state to deal with.