ABSTRACTContemporary ontological constructivism often rests on the belief that social reality emerges from tacit agreements, underpinning mutual expectations and trust. In social theory, the concept of agreement has evolved from explicit social contracts to normative consensus and the idea of tacit knowledge that subtly binds social actors. This article challenges this prevailing approach by dissecting various constructivist positions and exposing the implications of agreement‐based ontological constructivism on our understanding of culture, norms, and society. The author revisits an alternative perspective, claiming that human society is equally a structure of disagreement. Emphasizing disagreement advocates for a realistic social theory and highlights the vital role of fiction in shaping social life.