"[W]hile there is no doubt that Marx at this time shared the usual townsman's contempt for, as well as ignorance of, the peasant milieu, the actual and analytically more interesting German phrase ("dem Idiotismus des Landlebens entrissen") referred not to "stupidity" but to "the narrow horizons", or "the isolation from the wider society" in which people in the countryside lived. It echoed the original meaning of the Greek term idiotes from which the current meaning of "idiot" or "idiocy" is derived, namely "a person concerned only with his own private affairs and not with those of the wider community". In the course of the decades since the 1840s, and in movements whose members, unlike Marx, were not classically educated, the original sense was lost and was misread."
January 1, 1970
https://en.wikiquote.org/wiki/The_Communist_Manifesto