On 10 October 2018, a symposium was held by the University of Sheffield Political Theory Research Group discussing Alasdair Cochrane's book Sentientist Politics: A Theory of Global Inter-Species Justice, published October 2018 by Oxford University Press. This forum contains extended versions of the papers at the symposium. Cochrane opens with a synopsis of the book. Siobhan O'Sullivan then reflects upon Cochrane's methodology of ideal theory and his cosmopolitanism, followed by a reply from Cochrane. Next, Josh Milburn explores the place of wild animals in Cochrane's sentientist cosmopolitan democracy, and Cochrane offers a reply.