In his latest book, Elliott Sober argues that Darwin's theory is best described not as evolution by natural selection but as common ancestry plus natural selection."-John Hedley Brooke, Andreas Idreos Professor of Science and Religion and director of the Ian Ramsey Centre, University of Oxford.<BR><BR>"In these essays, Elliott Sober offers analyses of the logical structure of evolutionary theory, natural selection, and the confrontation between naturalism and creationism."-Douglas J. Futuyma, Distinguished Professor, Department of Ecology and Evolution, Stony Brook University.<BR><BR>Elliott Sober offers a reassessment of a number of aspects of Darwin's arguments in the Origin of Species. The book integrates historical material with contemporary evolutionary ideas.-Samir Okasha, Professor of philosophy of science, University of Bristol.