psychosis, that is aetiologically linked with environmental failure, failure to facilitate the maturational processes, at the stage of double dependence… Failure here is called privation… failure of the environment that was perceived by the child as such at the time that the failure occurred… The name given to this state of affairs is deprivation. This is the point of origin of the antisocial tendency
Winnicott’s central taxonomic statement distinguishing privation from deprivation as two qualitatively distinct orders of environmental failure, each generating a different psychopathological outcome.
, The Maturational Processes and the Facilitating Environment, 1965thesis