The Introduction familiarises the reader with Galen, his life and work, and offers essential information on his engagement with ethical philosophical writings. It also provides a brief introduction to practical ethics in antiquity, and foregrounds the contribution of the present study and the methodology through which the study will explore the topic under investigation. Finally, the Introduction gives an overview of the main chapters of the book.

Chapter 1 provides a systematic account of the main moral themes and types of moralism in Galen. Among these, the most general level is represented by an unparticularised moralism, in which the author pronounces ethical verdicts with universal application. Galen’s aim here is not to override moral relativism (in the modern sense of the term) nor restrain moral freedom. Rather, he seeks to delimit what he wishes to stigmatise as deviant behaviour as lucidly as possible, so as to be able to offer rudimentary directives for goodness effectively. In this model of basic moralism, even though there are instances where the author’s moral viewpoint features in a commanding fashion, reference is made to an astute reader who either embraces, upon reflection, Galen’s viewpoint or judiciously considers what is at stake when the former goes astray.

Scottish moral philosophy was two-sided, concerned partly with the human propensity to certain types of behaviour, partly with our ability to appreciate the moral worth of such behaviour in ourselves and in others. The behavioural aspect seen as – and sometimes called – practical ethics, while the concern with moral judgment was considered to be purely metaphysical and part of the theory of the mind. Natural jurisprudence was the central part of practical ethics that dealt with the virtue of justice understood as the sum of our duties and associated rights, and a central task for this intellectual and academic discipline was to explain why some parts of justice were distinguished from the rest of the virtues by being the subject of the institutions of justice, namely adjudication, law and legislation. All the Scottish thinkers saw themselves as Newtonians concerned with the empirical demonstration of the regularities of the physical and the moral realms, most of them (Hutcheson, Turnbull, the Moderates, the Common Sense thinkers) taking these regularities to be evidence of a divinely instituted order and purpose in the world. Hume and Smith took a different view of the metaphysics of moral and hence of moral science and natural jurisprudence.