Dementia (from L.demens), commonly referred to as insanity or madness, is usually associated with a progressive loss or weakening of self control, thought and/or reason. In its more serious forms, dementia is often mistakenly referred to as mental imbecility or even idiocy.
... 7 - Reinhard Heydrich, Nazi official
March 20 - B. F. Skinner, behavioral psychologist (+ 1990)
March 23 - Joan Crawford, actress
March 26 - Joseph Campbell, ...