Running with the Red Queen: reflections on 'Sex versus non-sex versus parasite'

The scientific output of W. D. Hamilton can be broadly split into two parts; the first dealing with inclusive fitness and the evolution of social behaviour while the second part focused on the role of parasites in the evolution of sex. This change in research interest was marked by a classic paper published in this journal in 1980, 'Sex versus non-sex versus parasite'. To mark Hamilton's death I consider the historical background and influence of this paper. [ABSTRACT FROM AUTHOR]