Biologist Paul Ehrlich and director for the Center of Conservation Biology at Stanford University Anne Ehrlich dedicate this book, “To Homo sapiens, which through the extinction of others endangers itself;” an appropriate summary.  This husband and wife duo have spent decades warning about the dangers of overpopulation, and in Extinction they focus on the affect it can have on species’ populations, the environment, and, ultimately, humanity itself.  It is a straight-forward, compelling narrative that dissects why we should save even the lowliest of species, how we have threate