Quantum and systems theory in world society: Not brothers and sisters but relatives still?

This article provides a sympathetic, yet also somewhat critical, engagement with the notion of ‘quantizing’ by exploring substantive overlaps between quantum and systems theory. It is based on the observation that while quantum theory is ‘non-classical’ in its entire world-view, there is a danger that when it comes to the social world it is simply laid on a world-view of that world, which remains at its core ‘classical’. This situation calls for engaging quantum with existing non-classical social theories. Resemblances between quantum and systems theory are obviously given through similarities around the concepts of observation and meaning, whose status and function in both bodies of theory is explored. We then probe the degree to which obvious analogies in fact could be read as overlaps and similarities that could be put to complementary analytical use: in a sense, we argue that systems theory ‘does’ quantum theory, and vice versa. The article concludes with some vistas of this discussion for the field of international relations.