This book reconceives virtue epistemology in light of the conviction that we are essentially social creatures. Green’s account is based on the extended credit view, which conceives of knowledge as an achievement and broadens that focus to include team achievements in addition to individual ones. He argues that this view does a better job than alternatives of answering the many conceptual and empirical challenges for virtue epistemology that have been based on cases of testimony. The view also allows for a nuanced interaction with situationist psychology, dual processing models in cognitive science, and the extended mind literature in philosophy of mind.