There have been several important forerunners of the idea of an enacted dimension of analytic process. Prescient theorists from every corner of the psychoanalytic spectrum have foreshadowed today’s interest in this unconscious, interactive dimension of analytic process. Dating back as early as the 1940s and 1950s, and writing from within such varied traditions as Kleinian, British object relations, Freudian, and Interpersonal, these theorists have pr oposed a variety of concepts that attempt to take formal theoretical account of the complex, unconscious interactions that evolve within the transference-countertransference matrix.1