Elliott Sober teaches philosophy at University of Wisconsin-Madison. His research is in the philosophy of science, especially in the philosophy of evolutionary biology. Sober’s books include The Nature of Selection(1984), Reconstructing the Past -- Parsimony, Evolution, and Inference (1988), Philosophy of Biology (1993),Unto Others -- The Evolution and Psychology of Unselfish Behavior (1998, coauthored with David Sloan Wilson), Evidence and Evolution – the Logic Behind the Science (2008), Did Darwin Write the Origin Backwards? (2011), and Ockham’s Razors – A User’s Manual (2015).