Threshold Fear is not a fear of place. It is a fear of becoming unwatched.
A class of spatial phobias (agoraphobia, claustrophobia, fear of heights) understood not as fear of places, but as the adult residue of childhood surveillance. The terror is not spatial danger but loss of witnessing presence.
Agoraphobia, claustrophobia, fear of heights, and related spatial phobias are not responses to environmental danger. They are the adult manifestation of a child's internalised hypervigilance: structural residue of early psychic surveillance installed through prolonged exposure to a controlling, chaotic, anxious, or shame-driven caregiver.
The underlying terror: Without external surveillance, I don't know who I am. I might disappear. I cannot cohere as a self.
The cure is not safety. It is identity unshackled from surveillance. Standard exposure therapy fails because it addresses spatial danger when the problem is relational absence.