Glenn Lesses

Chapter VI is an extended sketch of Plato 's psychological theory found in the Republic, especially Book IV. Plato, unlike Socrates, distinguishes among three kinds of desire, corresponding to the three parts of the soul. Plato, however, still agrees with Socrates that all desires are belief-dependent. Furthermore, because Plato is much clearer than Socrates about the nature of goods, he is able to distinguish among three distinct kinds of beliefs about what is good. So Plato also agrees with Socrates that all desires are for the good, if we speak properly of what is believed to be good. The picture of Plato 's views that emerges in this study is a fundamentally Socratic one and a development of Socratic psychology. This picture is somewhat contrary to what recent commentators have claimed about how the positions of Socrates and Plato are related. Plato, it is said, rejects the Socratic proposal about desire and its role in human motivation. It is argued in this study, however, that such a view rests upon certain misconceptions of both the Socratic and Platonic positions. ;This study has the following structure. Chapter I discusses the methodology of this dissertation and the chronology of Plato 's dialogues. Chapters II-V develop the central features of Socratic psychology. In chapter II, we establish that virtue is a craft. This is particularly important because, unlike other Socratic crafts which are merely cognitive, virtue has affective characteristics also. Virtue, moreover, aims at producing goods. Chapter III examines the nature of Socratic desire. We argue by examining both linguistic evidence and texts where there is some suggestion to the contrary that Socrates does not distinguish among kinds of desire. It is also shown that desire has two key features for Socrates. All desire is belief-dependent and, in particular, involves beliefs about what is good. Because of these features, chapter IV is concerned with the Socratic analysis of the structure of goods. We find in such dialogues as the Lysis, Euthydemus, Gorgias, and Meno a record of some confusion about the nature of goods. Finally in chapter V, we show how Socrates applies his account of desire to problems in philosophical psychology. He holds that knowledge is necessary and sufficient, not only to achieve a certain psychological state, but also for certain kinds of action. He provides an alternative explanation for what is commonly held to be weakness of will. There are also suggestions which we explore that Socrates has original views, deriving from his account of desire, about the nature of action and psychological freedom. ;Both Socrates and Plato attempt to demonstrate that moral behavior is rational, by grounding it in the structure of human wants. This study examines the accounts of desire to which they appeal and shows how desire so conceived is related both to human rationality and to human motivation. Much of what is said here bears upon ethical questions, but our principal concern is not ethics, but moral psychology--the psychological underpinnings for the Socratic and Platonic ethical views