The gestural origin of language

Prologue : vision of voice

Grasping language : sign and the evolution of language

Language in the wild : Paleontological and primatological evidence for gestural origins

Gesture, sign, and speech

Gesture, sign, and grammar : the ritualization of language

Conceptual spaces and embodied actions

The gesture-language interface

Invention of visual languages

Epilogue : a vision of unity.