the subjective experience of psychic multiplicity, which we can think of as many inner personalities operating in one person, was widely considered pathological. For another, my professional culture routinely used adjectives such as needy, hostile, nurturing
Schwartz identifies psychic multiplicity as the operative paradigm of IFS, explicitly naming it and challenging the monolithic cultural assumption that plural inner personalities are pathological rather than normative.
, Internal Family Systems Therapy, 1995thesis