Reviews

Astronomer Sagan is probably the biggest name in popular science writing, a fact that should assure that his latest book--written with his wife, Druyan--will find a wide audience. Sagan's goal is to explain how luck and natural selection combined to produce human beings after three and a half billion years of life on earth. Human behavior, he stresses, results more from similarities with our animal ancestors than from any unique qualities we may possess. Sagan flounders a bit early on in his effort to explain molecular evolution, but he picks up speed later when the focus shifts to primate behavior. Despite a preference for the overly dramatic phrase at the expense of scientific clarity, the argument is coherent throughout. While this is hardly one of the best books on human evolution, it will likely be very popular, especially in public libraries. Previewed in Prepub Alert, LJ 6/1/92.-- Eric Hinsdale, Trinity Univ. Lib., San Antonio

In a leisurely, lyrical meditation on the roughly four-million-year span since life dawned on Earth, Sagan and Druyan ( Comet ) argue that territoriality, xenophobia, ethnocentrism, occasional outbreeding and a preference for small, semi-isolated groups are elements in a survival strategy common to many species, including Homo sapiens. Yet society's problems, they assert, increasingly demand global solutions and require a dramatic, strategic shift which the authors optimistically believe humankind is capable of achieving. This engaging, humane odyssey offers a stunning refutation of the behavioristic worldview with its mechanistic notion that animals (except for humans) lack conscious awareness. Writing with awe and a command of their material, the husband-wife team cover well-trod terrain while they discuss the evolution of Earth's atmosphere and life forms, the genetic code, the advantages of sexual reproduction. The last third of the book, dealing with chimpanzees, baboons and apes, is the most interesting. Sagan and Druyan find chimps' social life ``hauntingly familiar'' with its hierarchy, combat, suppression of females and chimps' remarkable ability to communicate through symbols. First serial to Parade. (Oct.)