Interpersonalism, fifty years ago, was a radical departure from the Freudian position, both metapsychologically and politically. Indeed, it was radical enough to warrant apostasy and excommunication. I trace the vicissitudes of our outsiderness, both pro and con, up to our current achievement of genuine ecumenism. In general, the field has shifted from theoretical absolutism to a postmodern acceptance of multiple theories and truths, and, indeed, multiple selves. I suggest that we need to develop a vigilant dialectic of similarity and difference to avoid our past discordance and, what might well be worse, a well-intentioned but ultimately disastrous cooptation of our differences.