SUMMARY Philosophical reflection upon psychodrama requires a reduction of psycho-drama to the level of a grounding phenomenon. In the address published here (read at the Sixth International Congress for Psychodrama and Sociodrama, Amsterdam, August, 1971), psychodrama was reduced to the phenomenon of „men who enter into each other's lives in order to help one another”. Reflection upon this phenomenon teaches us that we are dealing with a recent datum in the history of western self-consciousness: western philosophy which has amply treated solitary subjectivity and more recently turned its attention to dual subjectivity, the I-Thou relation—has up to now bestowed very little reflection on plural subjectivity i.e. many men involved in one another's lives in order that in this multiple involvement they might each become a self with, for and through each other. Our starting point for achieving a reflective articulation of this phenomenon was the way in which Emmanuel Levinas describes dual subjectivity, to wit...