Samir Okasha is a Professor of Philosophy in the Philosophy department at the University of Bristol. His main research areas are philosophy of biology, philosophy of science and epistemology. Samir’s work in philosophy of biology is primarily focused on conceptual and foundational questions surrounding evolutionary theory. He also works on evidence and confirmation, causality, theory choice, skepticism and knowledge, and epistemological holism. Samir’s book Evolution and the Levels of Selection, published in 2006 by Oxford University Press, received the Lakatos Prize in 2009 for its outstanding contribution to philosophy of science. Between 2008-2011 Samir was the Principal Investigator on a major AHRC-funded research project, 'Evolution, Cooperation and Rationality', and is currently the Principal Investigator of the research project entitled 'Darwinism and the Theory of Rational Choice', funded by a European Research Council Advanced Investigator Award. For more information, visit his website.