In 1942, Ernst Mayr, one of the twentieth century's greatest scientists, published Systematics and the Origin of Species, a seminal book of the modern theory of evolution, where he advanced the significance of population variation in the understanding of evolutionary process and the origin of new species. Mayr formulated the transition from Linnaeus's static species concept to the dynamic species concept of the modern theory of evolution and emphasized the species as a community of populations, the role of reproductive isolation, and the ecological interactions between species.In addition to a preceding essay by Edward O. Wilson, this book includes the 16 papers presented by distinguished evolutionists at the colloquium. The papers are organized into sections covering the origins of species barriers, the processes of species divergence, the nature of species, the meaning of species, and genomic approaches for understanding diversity and speciation.

    Many considered Huxley's book a popularization of the ideas then emerging in evolutionary biology, but in fact Evolution: The Modern Synthesis is a work of serious scholarship that is also accessible to the general educated public. It is a book in the intellectual tradition of Charles Darwin and Thomas Henry Huxley--Julian Huxley's grandfather, known for his energetic championing of Darwin's ideas. A contemporary reviewer called Evolution: The Modern Synthesis "the outstanding evolutionary treatise of the decade, perhaps the century." This definitive edition brings one of the most important and successful scientific books of the twentieth century back into print. It includes the entire text of the 1942 edition, Huxley's introduction to the 1963 second edition (which demonstrates his continuing command of the field), and the introduction to the 1974 third edition, written by nine experts (many of them Huxley's associates) from different areas of evolutionary biology.