Critiques were drawn of the various fashionable conservative notions, which made them seem gimmicky at best, crackpot at worst.
Indeed, Wolf's journey to the crackpot fringe was completed a long time ago.
That has become the accepted theory, and anyone talking seriously about refrigerator mothers today would be considered a crackpot.
"mentally unbalanced person," by 1900, probably from crack + pot (n.1) in a slang sense of "head." Cf. crack-brain "crazy fellow" (late 16c.). Earlier it was used in a slang sense "a small-time big-shot" (1883), and by medical doctors in reference to a "metallic chinking sometimes heard when percussion is made over a cavity which communicates with a bronchus."
: my colleague's crackpot notions
A crazy idiot; an addled fool; eccentric: He's a crackpot about flying saucers (1883+)