TINT is an interdisciplinary and international endeavour sponsored by the Academy of Finland. It deals with issues of unity and disunity in and around the social sciences considered in their contemporary context. Important interdisciplinary encounters are taking place between the social sciences, as well as between the social sciences and the cognitive and biological sciences. These interactions and transformations are not smooth and uniform, they rather involve tensions and conflicting tendencies towards both integration and disintegration. The ambition of TINT is to look into these tendencies and tensions from the point of view of the philosophy and social studies of science, employing concepts such as model, explanation, mechanism, and unification. Special attention is paid to economics as a major player in these developments, both as an exporter and importer of ideas.