Abstract
This article aims to clarify how these two thinkers interacted philosophically to develop, challenge and enrich each other's thinking. To this end, the article employs a chronological order, tighter than Perry's, of six periods of interaction: Royce's pre-Harvard period, four at Harvard, and one after James's death. Pertinent to the genesis of James's will-to-believe doctrine, in his "Principles of Psychology" James credited Royce's account of the psychology of belief as the clearest he knew. When James later compared Bradley's "Appearance and Reality" with Royce's self-confessedly "hasty and unsound" "Conception of God", James's suspicions about Royce's argument for the "absolute" were further aroused