Harry Stack Sullivan

The champion of the "Interpersonal" field, Sullivan argued that there is no such thing as an isolated personality—we only exist in the space between ourselves and others. He viewed anxiety not as an internal glitch, but as a social contagion, a tension that arises from our desperate need for security and belonging. He is the observer of the "Social Mirror," the one who realized that we are shaped more by our conversations than by our solitary dreams. He represents the radical idea that to heal a person, you must first understand the tribe they carry within them.