The cultural norm is imprinted. Any chance of learning alternative systems is destroyed via a body chemical that is released dissolving any open, unmyalinated, nerve connections. A cultural norm of intellectual materialism is set in consciousness. Self is known as emotions related to love within creativity. There is longing within hopelessness and separation for what should be evolving.
Drugs temporarily displace the sense of flight or fight.
The brain is accordingly restructured by the heart via the pituitary and pineal glands and the hypothalamic area of the brain. There is no further development apart from this system. Sudbury school does not allow science to determine when a child should do this or that. Rather, the child's interest takes them there when they are ready. And, preferably, a guru with an open heart would show up now and then.