Huh. 80/20 is a term I know from studying Chinese history; it's used to describe historical population distribution as related to resources such as fresh water (basically, 80% of the population lived on 20% of the land, and the dividing line matched up closely to the 15" rainfall line).

It's noteworthy that MRAs use…

I am simultaneously amused and bemused that the author of these words reads Jezebel.