David Johnson is a leading expert in Xenophon's Socratic and non-Socratic writings. He is the author of numerous articles on central issues in this field, and is the co-editor with Gabriel Danzig and Donald Morrison of Plato and Xenophon: Comparative Studies. He is one of the chief instigators of the revival in the study of Xenophon's Socratic writings, and brings a vast knowledge of Xenophon and all the literature surrounding him, both in the fourth century and in modern scholarship.