Reviewed by: Aristotle on the Concept of Shared Life by Sara Brill Zoli Filotas Sara Brill. Aristotle on the Concept of Shared Life. Oxford: Oxford University Press, 2020. Pp. 304. Hardback, $100.00. This book is a sweeping survey of Aristotle's approach to human life. It covers what might seem to be an idiosyncratic set of topics: friendship, animal behavior, commerce, tyranny, and motherhood are among the more prominent. But Sara Brill pulls them together into a cohesive and illuminating picture, showing how each reflects Aristotle's conception of the concept "life" and the two Greek words, zôê and bios, that he uses to discuss it. The book rebukes thinkers who draw too sharp a contrast between animal life, on the one hand, and human politics, on the other. Until recently, Brill writes, that has been the dominant trend, uniting thinkers otherwise as different as Giorgio Agamben and David Keyt. For writers like them, human beings must overcome and sublimate their base, animal instincts (zôê, "mere life") in order to develop rational, uniquely human "ways of life" (bioi) like the lives of the citizen and the philosopher. For Brill, by contrast, the relationship between a person and the polis in Aristotle is "an intensified form of the relations between any animal and its proper habitat" (29). Indeed, every animal species has a distinctive way of life, a bios. The lavish discussion of animal "personality" or "character" (ethos) in the History of Animals suggests their range: lions are brave, cattle are stupid, dolphins are gentle, and so on. A personality not only helps an animal flourish in some habitat (topos) but also defines its relationships with other members of its species. So although Aristotle only classifies a few animal species as "political," Brill reminds us that there is a clear sense in which all are social. Aristotle famously claims that we humans are the "most political" of all animals, but Brill shows that this claim is both incomplete and misleading. For although Aristotle thinks that we outdo even bees in organized cooperation, he also stresses that we outdo even "warlike" eagles in our capacity for violence and solitude. Confronted with the opposition between solitary and gregarious ways of life, human beings "dualize" or "play a double game" (epamphoterizei) (HA I.1, 488a7). That is, much as frogs have water-dwelling and land-dwelling inclinations, humans are socially amphibious. Indeed, every human behavior—communal, solitary, and contentious alike—turns out to be an expression of animal nature. Brill points out that much of the Politics emphasizes the negative, the way that human beings make their own and each other's lives unlivable. Thus, although Aristotle embraces the sweetness of life, which has a distinct and intrinsic pleasure, his political project anticipates Nietzsche in squarely and unflinchingly studying its "horrors" (254). For Brill, the apex of human sociality in Aristotle is not politics but the so-called "perfect" friendship that Aristotle describes in Nicomachean Ethics VIII–IX and Eudemian Ethics VII. Perfect friends, Aristotle says repeatedly, "share a life" (suzên, cognate with zôê rather than bios). Friends grieve and rejoice together, perceive together, and philosophize together too. Brill emphasizes that this list includes the full range of psychic functions, from appetite all the way up to the highest forms of abstract thought. As they live together, friends build up a "nexus of meaning and value," a "world as it is created through the sharing of pleasure, judgment, and action" in which there "emerges a subjectivity which cannot be easily or simply conceived as 'mine'" (43, emphasis in original). In the best kinds of friendship, we realize that human life is lived by the partnership itself, not just the friends individually. [End Page 149] But Brill stresses that Aristotle thinks few people will ever find "perfect friendship." It is completely out of reach for most citizens of any real-world city. Yet for Aristotle, the flawed and diverse citizens of every polis nevertheless engage in a form of shared life: shared perception of the just and unjust. How is that possible? Through fragile institutions and customs, what Aristotle calls an "adornment of habits and an arrangement of correct laws" (Politics II.5...