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No book like this could have been written without the generous assistance of the staffs of Lyndon B. Johnson Presidential Library, the Jimmy Carter Presidential Library, the Ronald Reagan Presidential Library, and the George Bush Presidential Library.
Language, our primary tool of thought and perception, is at the heart of who we are as individuals. Languages are constantly changing, sometimes into entirely new varieties of speech, leading to subtle differences in how we present ourselves to others.
This book considers how languages have traditionally been divided into families, and asks how they should classified in the future. It describes and applies computer programs from biology and evolutionary genetics to data about languages and shows how the power of the computer can be harnessed to throw light on long-standing problems in historical linguistics.