Too Many Animals, Too Many Thinkers

Animalism, the thesis that each of us is a human animal, is a prominent materialist account of what we are. Animalism is often motivated by an attractive line of reasoning, the Thinking Animal Argument. And, independently, animalism has been challenged by appeals to a metaphysical puzzle, the problem of the many. In this paper, I draw attention to the relationship between the Thinking Animal Argument and the problem of the many. I further argue that in virtue of this relationship, animalists are left in an unfortunate position: animalists cannot hold onto their most successful argument without undermining animalism itself.