 The chief purpose of this introductory article is to provide a brief survey of Fechner’s most important philosophical writings. No attempt is made to consider his writings on physics and psychology, which is the task for another article. The most important philosophical writings are, in my opinion, Nanna, Zend-Avesta and Ueber die physikalische und philosophische  Atomlehre.[2]  These writings represent the two sides of Fechner’s philosophy, the metaphysical and positivist. There is also no attempt to provide an account of Fechner’s Elemente der Psychophysik—even though some contemporaries regarded it as his most important work—since its results are essentially empirical and have, on Fechner’s own reading (see Fechner 1860: I, 6), little philosophical relevance. Because Fechner’s philosophy is incomprehensible without knowing about his life, this article also includes two biographical sections, one on his early life and another on his mental breakdown. The latter section, though seemingly superfluous, is crucial because it is the source and motivation for Fechner’s mature philosophy. The article concludes with a short analysis of Fechner’s theory of mind, which is probably that aspect of his philosophy of most contemporary interest. Finally,  a supplement: “Dr. Mises’ Merry Pranks”  contains a survey of Fechner’s early pseudonymous writings, which should shed light on his philosophical development.