Justin E. H. Smith in the New York Times:
Homo sapiens has long sought to set itself apart from animals — that is, apart from every other living species. One of the most enduring attempts to define humanity in a way that distances us from the rest of animal life was Aristotle’s description of the human being as a “political animal.” By this he meant that human beings are the only species that live in the “polis” or city-state, though the term has often been understood to include villages, communes, and other organized social units. Implicit in this definition is the idea that all other animals are not political, that they live altogether outside of internally governed social units.
This supposed freedom from political strictures has motivated some, such as the 19th-century anarchist aristocrat Piotr Kropotkin, to take nonhuman animals as a model for human society. But for the most part the ostensibly nonpolitical character of animal life has functioned simply to exclude animals from human consideration as beings with interests of their own.
What might we be missing when we cut animals off in this way from political consideration? For one thing, we are neglecting a great number of solid scientific facts.