Diversity Reading List

Introduction: Structural realism was born in the attempt to reach a compromise between a realist argument and an antirealist one, namely the 'no miracle' argument and the 'pessimistic meta-induction', respectively. In recent years, John Worrall has drawn attention to an epistemological version of structural realism, which he traces back to Henri Poincaré. French and Ladyman, on the other hand, have urged a metaphysical or ontic structural realism, which offers a 'reconceptualisation of ontology, at the most basic metaphysical level, which effects a shift from objects to structures.' French and Ladyman want to maintain the distance from neo-Kantianism and detach metaphysical structural realism from neo-Kantian epistemology so as to do justice to the realist's demand for mind-independence. This manoeuvre raises, however, some difficulties that have been at the centre of a recent ongoing debate: can we really 'dissolve' entities into mathematical structures? How can we even conceive of structural relations without relata? In this paper the author offers a diagnosis of the current standoff within structural realism between the epistemological and the metaphysical variant, by drawing attention to some important assumptions underlying the structural realist programme, and to their philosophical sources. It is the heterogeneity of these sources - she suggests - that is mainly responsible for the current stand-off within structural realism.

Abstract: In this paper I argue for a view of groups, things like teams, committees, clubs and courts. I begin by examining features all groups seem to share. I formulate a list of six features of groups that serve as criteria any adequate theory of groups must capture. Next, I examine four of the most prominent views of groups currently on offer - that groups are non-singular pluralities, fusions, aggregates and sets. I argue that each fails to capture one or more of the criteria. Last, I develop a view of groups as realizations of structures. The view has two components. First, groups are entities with structure. Second, since groups are concreta, they exist only when a group structure is realized. A structure is realized when each of its functionally defined nodes or places are occupied. I show how such a view captures the six criteria for groups, which no other view of groups adequately does, while offering a substantive answer to the question, 'What are groups?'