PART 1: INSIGHTS FROM COMPARATIVE ANIMAL BEHAVIOUR PART 2: THE BIOLOGY OF LANGUAGE EVOLUTION: ANATOMY, GENETICS, AND NEUROLOGY PART 3: THE PRE-HISTORY OF LANGUAGE: WHEN AND WHY DID LANGUAGE EVOLVE? PART 4: LAUNCHING LANGUAGE: THE DEVELOPMENT OF A LINGUISTIC SPECIES PART 5: LANGUAGE CHANGE, CREATION, AND TRANSMISSION
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