Review of Mary Midgley's Beast and Man: the Roots of Human Nature, Revised Edition, London, Routledge, 1995. John Black Malaspina University College Mary Midgley published the original version of Beast and Man sixteen years ago. In the Introduction which is the only real distinguishing feature of the revised edition, she supports issuing it because her salutary advice to biology, psychology and the social sciences has gone unheard, with desperate consequences for political life in the West. While she is surely right to claim that "biological Thatcherism" - the neo-conservative descendant of social Darwinism - continues to hold sway, it is difficult to agree that the major causes of corporate hegemony include the popularity of sociobiology - her prime antagonist in this book - and therefore that the book had any chance of counteracting them. It is, nevertheless, in the quieter terms of academic inquiry, a success. Beast and Man is a punchy, insightful, essentially Wittgensteinian examination of the notion of human nature and its r“le in ethics and psychology. According to Midgley, humans are rather more like other animals than we have hitherto allowed ourselves to believe. The evidence involves a series of reminders of how primitive we are and of how sophisticated animals are. Central to the understanding of both terms in this assimilation are the notions of nature, instinct and purpose. To accommodate it, science must prefer the methods of ethology and comparative psychology to those of neurobiology, physiology, behavioural zoology and sociobiology. Eschew quantification, restrict mechanism to its proper limits, embrace functionalism and one will understand the behavioural and psychological characteristics we share with other animals. Furthermore, since it makes crucial reference to language, rationality and culture, wrongly thought to be exclusively distinctive of humans, it is this ethological understanding which alone can inform ethics. Midgley's digressive style is annoying when her otherwise methodologically sound tracing of the conceptual map gives way to unjustified asides: thus Aristotle is called an Egoist without any hint that his altruistically-loaded concept of eudaimonia makes this at least controversial; Wittgenstein is upbraided as animalically incorrect for using an example in which someone says "You're behaving like a beast . . . " without any admission that an author is distinct from his or her characters. It sometimes appears that Midgley has not learned her own lessons: despite a sophisticated dispositional account of motivation, a robin is said to twitter territorially on account of its current feeling; morality is described as a brake upon instinct, despite an account of instincts which is broad enough to include moral sentiments; although Midgley argues that explanations at different levels may be compatible, she repeatedly dismisses evolutionary explanations of behaviour because they cannot be applied literally at the level of individual motivation. However, these flaws do not obliterate the overall strengths of the book. The case is fundamentally compelling, the refutation of the worst pretensions of sociobiology is, interestingly, both charitable and devastating, and the redrawing of our outdated pictures of the conceptual landscape is insightful and thorough. It won't precipitate the great social revolution; it will contribute to a better way of understanding animals of all kinds.