Abstract

Speciesism, broadly understood as the view that species membership is a morally relevant property, has been a central topic of debate within animal ethics for around 50 years. However, in all this time, animal ethicists have paid relatively scant attention to the nature of species membership itself. This seems potentially regrettable, since species membership's precise nature is presumably highly pertinent to the question of its exact moral relevance. Here, I advocate for a ‘species-focused’ approach to assessing speciesism, arguing that, in debating the merits of speciesism, animal ethicists should (i) centre the nature of species membership, and (ii) consult philosophers of biology. Adherence to this second prescription appears necessary since a lot of what philosophers of biology believe regarding the nature of species membership appears contrary to what many animal ethicists have seemingly assumed.