1. See for instance Robert M. Young, Darwin’s Metaphor: Nature’s Place in Victorian Culture (Cambridge: Cambridge University Press, 1985)
2. John C. Greene, Science, Ideology and World Wiew (Berkeley: University of California Press, 1981). Recent books on Darwin confirm that this debate is ongoing.
3. John C. Greene Ernst Mayr, One Long Argument: Charles Darwin and the Genesis of Evolutionary Thought (Cambridge, Mass.: Harvard University Press, 1991), denies any input from social values.
4. Robert J. Richards, The Meaning of Evolution: The Morphological Construction and Ideological Reconstruction of Darwin’s Theory (Chicago: University of Chicago Press, 1991) advocates a progressionist interpretation of the theory
5. Adrian Desmond and James Moore, Darwin (London: Michael Joseph, 1991), see the origins of the theory in the more pessimistic social values of the 1830s.