What is the relation between gestures and speech? In terms of symbolic forms, of course, the spontaneous and unwitting gestures we make while talking differ sharply from spoken language itself. Whereas spoken language is linear, segmented, standardized, and arbitrary, gestures are global, synthetic, idiosyncratic, and imagistic. In Hand and Mind, David McNeill presents a bold theory of the essential unity of speech and the gestures that accompany it. This long-awaited, provocative study argues that the unity of gestures and language far exceeds the surface level of speech noted by previous...