title: Letter: A sense of futility and emptiness.
mesh_terms: D005639:Frustration; D006801:Humans; D001523:Mental Disorders / Q000209:etiology*; D009014:Morals; D012649:Self Concept; D012917:Social Adjustment; D012918:Social Alienation; D012922:Social Change; D012945:Social Values; D014481:United States