On The Atlantic’s Tumblr, an explanation of the origin of highbrow, lowbrow etc. It’s from phrenology, that Roots album and old pseudoscience that said skull shape could define your abilities. People with taller brows (foreheads) supposedly had greater capacity for intellectual reflection or somesuch (hence phrenology apparently being a reason for racial discrimination).

Ummm, I forget where I saw this linked, probably the Awl?