A sophisticated human can become primitive. What this really means is that the
human's way of life changes. Old values change, become linked to the landscape
with its plants and animals. This new existence requires a working knowledge of
those multiplex and cross-linked events usually referred to as nature.
It requires a measure of respect for the inertial power within such natural
systems. When a human gains this working knowledge and respect, that is called
"being primitive." The converse, of course, is equally true: the primitive can
become sophisticated, but not without accepting dreadful psychological damage.

-- The Leto Commentary, After Harq al-Ada
--[children-of-dune]--