The purpose of this paper is to argue for psychological egoism, i.e., the view that the ultimate motivation for all human action is the agent’s self-interest. Two principal opponents to psychological egoism are considered. These two views are shown to make human action inexplicable. Since the reason for putting forward these views is to explain human action, these views fail. If psychological egoism is the best explanation of human action, then humans will not differ as regards their motivations for their (...) actions. However, humans will differ as regards their knowledge of what is in fact in their self-interest. (shrink)

Swartz attempts the commendable task of motivating nonprofessional philosophers to engage in the activity of identifying and criticizing their own metaphysical theories. He does this first by explaining what a metaphysical theory is and how to evaluate it, and second by examining the plausibility of various theories concerning space, time, properties, synchronic identity, diachronic identity, and personal identity. A professional philosopher will find it easy to read. An upper-level undergraduate or beginning graduate student would, I imagine, find it challenging at (...) times but readable. There is a glossary of technical terms, further readings suggested, bibliographical references, a name index, and a subject index at the end of the book. (shrink)