Part I. Pre-Grammar: 1. Animal syntax? implications for language as behaviour; 2. First shared lexicon -- Part II. What Evolved: 3. Syntax in the light of evolution; 4. What evolved: language learning capacity; 5. What evolved : languages -- Part III. What Happened: 6. The pre-existing platform; 7. Gene-language coevolution; 8. One word, two words, . . .; 9. Grammaticalization

1. Language and languages -- Origin
2. Grammar
3. Comparative and general -- History
4. Historical linguistics