This book proposes a new two-step approach to the evolution of language, whereby syntax first evolved as an auto-organizational process for the human conceptual apparatus (as a Language of Thought), and this Language of Thought was then externalized for communication, due to social selection pressures. Anne Reboul first argues that despite the routine use of language in communication, current use is not a failsafe guide to adaptive history. She points out that human cognition is as unique in nature as is language as a communication system, suggesting deep links between human thought and...