The collective unconscious is culturally shaped rather than inborn. [contrarian]
On the level of philosophic discussion, this would be the place to bring up the old problem of instinct and habit: instinct, which is inborn (we know how we must view this “innateness”), invariable, specific; habit, which is acquired. On this level one would have only to demonstrate that Jung has confused instinct and habit. In his view, in fact, the collective unconscious is bound up with the cerebral structure, the myths and archetypes are permanent engrams of the race. I hope I have shown that nothing of the sort is the case and that in fact the collective unconscious is cultural, which means acquired. Just as a young mountaineer of the Carpathians, under the physico-chemical conditions of his country, is likely to develop a myxedema, so a Negro like Rene Maran, who has lived in France and breathed and eaten the myths and prejudices of racist Europe, and assimilated the collective unconscious of that Europe, will be able, if he stands outside himself, to express only his hatred of the Negro. One must move softly, and there is a whole drama in having to lay bare little by little the workings of processes that are seen in their totality. Will this statement be susceptible of understanding? In Europe, the black man is the symbol of Evil.
Frantz Fanon, Constance Farrington, Black skin, white masks, loc. 665