This volume collects twelve essays by Sanford C. Goldberg on the topic of social epistemology. The collection falls into two halves: the first half develops a proposal for a programme for social epistemology, its animating vision, foundational questions, and core concepts; the other half focuses on applications of this programme to particular topics. Goldberg characterizes the research programme as the exploration of the epistemic significance of other minds. This programme is dedicated to an examination of the various ways in which we depend epistemically on others, and to describe the proper way to evaluate beliefs according to the sort of dependence they exhibit. It thus provides the basis for identifying and characterizing various dysfunctions of our epistemic communities. The programme is put into practice by exploring such topics as the epistemic agency exhibited in inquiry, the practices that constitute news coverage, the basis for allegations of what we or others should have known, how reliance on another's testimony contrasts with reliance on an instrument, our reliance on others as consumers of testimony, and the epistemic significance of non-epistemic social norms—moral, political, professional, or relationship-based.