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This book is a critique of the experiments of recent years that tried to teach language to apes. The achievements of these animals are compared with the natural development of language, both spoken and signed forms, in children. It is argued that the apes in these studies acquired merely crude simulations of language rather than language itself and that there is no good evidence that apes can acquire a language. A survey of the communication systems of apes and monkeys in nature finds that these systems differ from language in profound ways--language is a uniquely human attribute.

This book is a critique of the experiments of recent years that tried to teach language to apes. The achievements of these animals are compared with the natural development of language, both spoken and signed forms, in children. It is argued that the apes in these studies acquired merely crude simulations of language rather than language itself and that there is no good evidence that apes can acquire a language. A survey of the communication systems of apes and monkeys in nature finds that these systems differ from language in profound ways--language is a uniquely human attribute.

Violent crime in America shot up sharply in the mid-1980s and continued to climb until 1991, after which something unprecedented occurred. The crime level declined to a level not seen since the 1960s. This revised edition of The Crime Drop in America focuses first on the dramatic drop in crime rates in America in the 1990s, and then, in a new epilogue, on the patterns since 2000. The separate chapters written by distinguished experts cover the many factors affecting crime rates: policing, incarceration, drug markets, gun control, economics, and demographics. Detailed analyses emphasize the...

Violent crime in America shot up sharply in the mid-1980s and continued to climb until 1991, after which something unprecedented occurred. The crime level declined to a level not seen since the 1960s. This revised edition of The Crime Drop in America focuses first on the dramatic drop in crime rates in America in the 1990s, and then, in a new epilogue, on the patterns since 2000. The separate chapters written by distinguished experts cover the many factors affecting crime rates: policing, incarceration, drug markets, gun control, economics, and demographics. Detailed analyses emphasize the...