This paper aims to contribute to a reassessment of the social significance of C.G. Jung's (1875-1961) analytical psychology. Contrary to a tenacious perception that Jung's work is little concerned with society, this paper suggests that the social dimension is a concern that permeates all of Jung's work, even his apparently most esoteric. The paper looks first at Jung's diagnosis of the problem of modernity, next at his understanding and general analytical psychological critique of mass society, and then at the contribution of his concept of synchronicity (meaningful acausal connection) to this critique. It concludes with a brief reflection on the possible usefulness of synchronicity for illuminating contemporary social and cultural events.