The origin of the Origin / Michael Ruse -- Darwin's analogy between artificial and natural selection in the origin of species / Mark A. Largent -- Variation and inheritance / Robert Olby -- Darwin’s theory of natural selection and its moral purpose / Robert J. Richards -- Originating species : Darwin on the species problem / Phillip R. Sloan -- Darwin's keystone : the principle of divergence / David Kohn -- Darwin's difficulties / A.J. Lustig -- Darwin's geology and perspective on the fossil record / Sandra Herbert and David Norman -- Geographical distribution in the Origin of species / Peter J. Bowler -- Classification in Darwin's Origin / Richard A. Richards -- Embryology and morphology / Lynn K. Nyhart -- Darwin’s botany in the Origin of species / Vassiliki Betty Smocovitis -- The rhetoric of the Origin of species / David J. Depew -- 'Laws impressed on matter by the Creator'? : the Origin and the question of religion / John Hedley Brooke -- ’Lineal descendants' : the Origin's literary progeny / Gillian Beer -- The Origin and political thought : from liberalism to Marxism / Naomi Beck -- The Origin and philosophy / Tim Lewens -- The Origin of species as a book / Michele Kohler and Chris Kohler.