I argue for the view that the scientific model which Plato consistently had in mind when sharpening his main ethical theory was medicine. Moreover, I ascribe to Plato a “medical model of ethics”. A careful examination of this model reveals how Plato appropriates several medical concepts and ideas by employing two central methodological devices in his thought: dialectical transposition and analogical characterisation. In discussing them, I identify different kinds of medical references in the dialogues –not all medical references in Plato have the same methodological status– and draw greater attention to the most recurrent medical analogies in them. More generally, the paper is also meant to provide a case study of the complex relationship between medicine and philosophy in Antiquity by examining in a new light the various ways in which the former served as an epistemological and ethical model for the latter.

This article examines Aristotle's views concerning the possibility of friendship between human beings and nonhuman animals. The suggestion that he denies this possibility is rejected. I reassess the textual evidence adduced by scholars in support of this reading, while adding new material for discussion. Central to the traditional reading is the assumption that animals, in Aristotle's view, cannot be friends in virtue of their cognitive limitations. I argue that Aristotle's account of animal cognition is perfectly consistent with the possibility of friendship between human beings and nonhuman animals.

This paper provides a new interpretation of Plato’s account of justice as psychic health in Republic IV. It argues that what has traditionally been considered to be one single analogy is actually a more complex line of reasoning that contains various medical analogies. These medical analogies are not only different in number but also in kind. I discuss each of them separately, while providing a response to various objections.

Plato’s ideas on the value of nature and humankind are reconsidered. The traditional suggestion that his thought is ethically anthropocentric is rejected. Instead “Ethical Ratiocentrism” (ER) is the environmental worldview found in the dialogues. According to ER, human life is not intrinsically valuable, but only rational life is. ER is consistent with Plato’s holistic axiological outlook but incompatible with ethical anthropocentrism.

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