Since the ground-breaking work of Saul Kripke, David Lewis, and others in the 1960s and 70s, one dominant interest of analytic philosophers has been in modal truths, which concerns the questions of what is possible and what is necessary. However, there is considerable controversy over the source and nature of necessity. In Modality and Explanatory Reasoning, Boris Kment takes a novel approach to the study of modality that places special emphasis on understanding the origin of modal notions in everyday thought. Kment argues that the concepts of necessity and possibility originate in a common...