The world attributes its misfortunes to the schemes and plottings of the very evil and powerful. I think stupidity is underestimated.
El mundo atribuye sus infortunios a las conspiraciones y maquinaciones de grandes malvados. Entiendo que se subestima la estupidez.
Original text (Spanish)
Notes from Wikiquote
Breve diccionario del argentino exquisito, 1978.