In this article, I discuss Otto Neurath’s philosophy in the context of Vienna Circle modernism. Following recent scholarship, the discussion considers as a starting point Neurath’s participation at the fourth International Congress of Modern Architecture (CIAM IV). However, the image of Neurath’s modernism that results from this perspective is incomplete because it tends to overlook the importance of scientific utopianism in Neurath’s thought. Scientific utopianism is a methodology proposed by Neurath for the social sciences in technological contexts, in which scientists (...) elaborate and develop plans (utopias) for the transformation of society, thus contributing to an informed societal debate. Decisions are nevertheless kept outside the domain of scientific activity. I claim that recognizing the centrality of scientific utopianism in Neurath’s philosophy is fundamental to understand Neurath’s modernism. This interpretation highlights the affinities of Neurath’s philosophy of the social sciences with the modern utopianism of H. G. Wells. Both authors consider that there can be no ultimate solution to social problems but that a plural and constant debate of proposals is fundamental for the improvement of society. Therefore, Neurath’s modernism connects his philosophy of science to the literary utopian tradition. (shrink)