The idea that serfs were the descendants of Ham soon became widely promoted in Europe. An example is Dame Juliana Berners (c. 1388), who, in a treatise on hawks, claimed that the "churlish" descendants of Ham had settled in Europe, those of the temperate Shem in Africa, and those of the noble Japheth in Asia (a departure from normal arrangements, which placed Shem in Asia, Japheth in Europe, and Ham in Africa), because she considered Europe to be the "country of churls", Asia of gentility, and Africa of temperance. As serfdom waned in the late medieval era, the interpretation of serfs being descendants of Ham decreased as well.