It describes and applies computer programs from biology and evolutionary genetics to data about languages and shows how the power of computers can be used to cast light on the long-standing problems in historical linguistics. They analyzed the relationship between linguistic and population genetics, and consider the extent to which language can be used to discover and understand the history and interrelations of human populations. their book will be a great practical interest to students and researchers in historical and comparative linguistics and will interest all those concerned with classification and diffusion of languages in fields such as archeology, genetics, and anthropology.