vol. 1 (Oxford University Press, 1998). A recent philosophical discussion of Hamilton’s work is Jonathan Birch’s

The Philosophy of Social Evolution (Oxford University Press, 2017). The kin versus group selection issue is examined by Elliott Sober and David Sloan Wilson in

Unto Others (Oxford University

kin and group selection’,

British Journal for the Philosophy of Science , vol. 67, 2015. Dawkins’s gene’s eye view of evolution is set out in

The Selfish Gene (Oxford University Press, 1976), and

The Extended Phenotype (Oxford University

ideas is found in Kim Sterelny and Paul Griffith’s

Sex and Death (University of Chicago Press, 1999). The major transitions discussion stems from John Maynard Smith and Eörs Szathmáry’s

The Major Transitions in Evolution (Oxford University Press, 1995); good philosophical treatments include Peter Godfrey-Smith’s

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