This book posits a bold reorganization of the structures of language, and heralds a reconsideration of its guiding assumptions. Human expressive behaviors like speaking, signing, and drawing may seem distinct, but they decompose into similar cognitive building blocks which coalesce in emergent states from a singular multimodal communicative architecture. This cognitive model accounts for unimodal and multimodal expression across all of our modalities, providing a “grand unified theory” that incorporates insights from formal linguistics, cognitive semantics, metaphor theory, Peircean semiotics, sign language, gesture, visual language, psycholinguistics, and cognitive neuroscience.