Elliott Sober is Hans Reichenbach Professor of Philosophy and William F. Vilas Research Professor 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: Evolutionary Theory in Philosophical Focus; Reconstructing the Past: Parsimony, Evolution, and Inference; Philosophy of Biology; Unto Others: The Evolution and Psychology of Unselfish Behavior (coauthored with David Sloan Wilson); and Evidence and Evolution: The Logic Behind the Science. He won the Lakatos Prize in 1991 and the American Philosophical Association named him Prometheus Laureate for 2008. He has been president of the Philosophy of Science Association and the American Philosophical Association (Central Division).