Biology: Does painting zebra stripes on cows reduce biting flies [yes]
Chemistry: Does Teflon™ as a food additive increase satiety/fullness [yes, allegedly safely?!]
Physics: Avoiding unpleasant spaghetti sauce texture
Engineering: Does using a ventilated UV shoe rack decrease odor [yes]
Aviation: Do intoxicated bats fly worse [yes]
Psychology: The effects of telling narcissists they're intelligent ["external feedback helped shape the subjects' perception of their own intelligence, regardless of the accuracy of that feedback" ; negative feedback is more impactful]
Nutrition: Is just cheese the favored pizza of reptiles [yes]
Pediatrics: Does garlic affect breast feeding [yes, babies will feed longer]
Literature: Does fingernail growth diminish as one ages [yes]
Peace: Does slight inebriation increase foreign language composition [yes]
I think "Statistically demonstrated that being stupid makes you a bad monarch" is a good fit in that vein :P Though I suppose it's a legitimately interesting question to what extent the monarch actually matters to their state's outcomes.
Seems like there would be noticable standout family groups in those populations if your theory is true but I don't think it is. Totally not calling you out (your post is a natural response to OP) but it's online reference in my experience is just another way to 'other' one ethnic group and call them inbreds online:
https://worldpopulationreview.com/country-rankings/inbreedin...