The culmination of about 25 years of research and study, this book traces the history of evolutionary thought and charts a path for its future. After Darwin wrote The Origin of Species in 1859, scientists created a synthesis of genetics, ecology and paleontology to explain how natural selection could produce change and form new species. Gould thinks that this "modern synthesis" has hardened into a dogma stifling the science. Gould claims that an obsession with "selfish genes" and simplistic versions of natural selection blinds researchers to the significance of new discoveries about how evolution really works. The rules by which embryos develop, for example, create constraints that channel the flow of evolution. Asteroid impacts and other catastrophes can send evolution off on unpredictable trajectories. And selection, Gould contends, may act not just on individuals or their genes, but on entire species or groups of species, and in ways we’ve only begun to understand. This book presents Gould in all his incarnations: as a digressive historian, original thinker and cunning polemicist. It is certainly not a perfect work. Gould gives short shrift to the tremendous discoveries spurred by "Darwinian fundamentalism," while he sometimes overplays the importance of hazy theoretical arguments that support his own claims. But even Gould’s opponents will recognize this as the magnum opus of one of the world’s leading evolutionary thinkers. ~ Publishers Weekly