The group-as-a-whole/Tavistock methodology is firmly rooted in psychoanalytic theory, especially the British School of Object Relations psychoanalysis of Klein (1975) and Bion (1961). Yet, as one of the primary theses of this book, the Tavistock model has heuristic value and power that transcends its psychoanalytic beginnings and current center. This extrapolation has previously included the topic of organizational transformation (Obholzer & Roberts, 1994), the study of multicultural dynamics (Hofstede, 2010), social psychology (Menzies-Lyth, 1960), and society/global phenomena (Volkan, 2014). This chapter seeks to demonstrate how the theory and practice of a Tavistock group has implications and applications for existential psychology and matters related to existence.