By the early 20th century, Ripley's tripartite Nordic/Alpine/Mediterranean model was well established. Most 19th century race-theorists like Arthur de Gobineau, Otto Ammon, Georges Vacher de Lapouge and Houston Stewart Chamberlain preferred to speak of "Aryans," "Teutons," and "Indo-Europeans" instead of "Nordic Race". The British German racialist Houston Stewart Chamberlain considered the Nordic race to be made up of Celtic and Germanic peoples, as well as some Slavs. Chamberlain called those people "Celt-Germanic peoples", and his ideas would influence the ideology of Nordicism and Nazism.