"Jeffersonian isolationism expressed an essentially cosmopolitan spirit. The Jeffersonian was determined - even at the expense of separating himself from the rest of the globe, and even though he be charged with provincial selfishness - to preserve America as an uncontaminated laboratory."

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Psychoanalysis , which interprets the human being as a socialized being, and the psychic apparatus as essentially developed and determined through the relationship of the individual to society, must consider it a duty to participate in the investigation of sociological problems to the extent the human being or his/her psyche plays any part at all.

— Erich Fromm