Some time since we and the chimpanzees went our separate evolutionary ways, probably towards the very end of that 6 million year period, an innovation occurred whose only precedent was arguably the DNA code itself. Language arose in our ancestors, and there had been nothing like it. Of course other species communicate, many of them vocally, but none of this comes close to the open-ended, generative capacity, the huge vocabulary, the nuanced subtlety, the permanent recordability of language. As an outsider, it is with real fascination that I have read this compendium. One of the merits of any book is its capacity to stimulate the reader to think beyond its confines. This, and other merits are possessed by Language Evolution in abundance.