To Michael Fordham
Dear Fordham, 14 June 1958
I don’t flatter myself on having a theory of heredity.
I share the ordinary views about it.
I am convinced that individual acquisitions under experimental conditions are not inherited.
I don’t believe that this statement could be generalized, since changes in individual cases must have been inherited, otherwise no change would have come about in phylogenesis; or we would be forced to assume that a new variety, or a new species, was shaped by the creator on the spot without inheritance.
Concerning archetypes, migration and verbal transmission are self-evident, except in those cases where individuals reproduce archetypal forms outside of all possible external influences (good examples in childhood dreams!).
Since archetypes are instinctual forms, they follow a universal pattern, as do the functions of the body.
It would be highly miraculous if that were not so.
Why should the psyche be the…
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