The depth psychologist Carl Jung, possibly as early as the 1920s, based on a trip he made to America, predicted that American whites would eventually be unable to resist the heavy downward pull of the primitive life of blacks. Jung predicted that whites would eventually "go black": "What is more contagious than to live side by side with a rather primitive people? Go to Africa and see what happens. When it is so obvious that you stumble over it, you call it going black... "The inferior man has a tremendous pull because he fascinates the inferior layers of our psyche, which has lived through untold ages of similar conditions... "Blacks remind us not so much of our conscious as our unconscious mind—not only of childhood but of prehistory." What Jung could not foresee at the time was that American culture would later celebrate integration as its greatest moral triumph and encourage whites to "go black" as proof that integration was succeeding, that America was the exceptional nation that had perfected its liberal constitution—creating, as Obama put it, a "post-racial" culture in which, as Michael Jackson sang, "it don't matter if you're black or white," since whites now behave like blacks.