This volume contains 22 revised papers originally presented at the 17th International Conference on Historical Linguistics, held August 2005 in Madison, Wisconsin, USA. The papers cover a broad range of languages, including well-studied languages of Europe but also Aramaic, Zoque and Uto-Aztecan, Japanese and Korean, Afrikaans, and the Pilbara languages of Australia. The theoretical approaches taken are equally diverse, often bringing together aspects of'formal'and'functional'theories in a single contribution. Many of the chapters provide fresh data, including several drawing on data from.