Introduction; Julie Zahle and Finn Collin.- Part I. Ontological Individualism-Holism.- What is Individualism in Social Ontology? Ontological Individualism vs. Anchor Individualism; Brian Epstein.- Social entities and the basis of their powers; Dave Elder-Vass.- Methodological localism and actor-centered sociology; Daniel Little.- Collective Responsibility and Group-Control; Andr's Szigeti.- Rethinking Micro-Macro Relations; Petri Ylikoski.- Part II. Methodological Individualism-Holism.- Dead Ends and Live Issues in the Individualism-Holism Debate; Harold Kincaid.- Explanatory Strategies beyond the individualism/holism debate; Jeroen van Bouwel.- Holism, Emergence and the Crucial Distinction; Julie Zahle.- Who are the Actors?; Finn Collin.- Are Individuals Fickle-Minded?; Mathew McCubbins & Mark Turner.