Since Darwin’s theory of evolution, questions about the origin of language have generated a rapidly growing scientific literature, stretched across a number of disciplines, much of it directed at specialist audiences. The diversity of perspectives – from linguistics, anthropology, speech science, genetics, neuroscience, and evolutionary biology – can be bewildering. Covering diverse and fascinating topics, from Kaspar Hauser to Clever Hans, Tecumseh Fitch provides a clear and comprehensible guide to this vast literature, bringing together its most important insights to explore one of the biggest unsolved puzzles of human history.