Julian Huxley (1887-1975), an English evolutionary biologist, was a prolific author and the leading figure in the mid-twentieth century effort to develop the modern synthesis of evolutionary theory. He was the first director of UNESCO, a founding member of the World Wildlife Fund, and the recipient of UNESCO's Kalinga Prize for the popularization of science in 1953, the Darwin Medal of the Royal Society in 1956, and the Darwin-Wallace Medal of the Linnean Society in 1958.

Massimo Pigliucci is Professor of Philosophy at the City University of New York.

Gerd B. Muller is Professor and Head of the Department of Theoretical Biology at the University of Vienna. He is a coeditor of "Origination of Organismal Form" (MIT Press, 2003) and "Environment, Development, Evolution" (MIT Press, 2003).

This classic work by Julian Huxley, first published in 1942, captured and synthesized all that was then known about evolutionary biology and gave a name to the Modern Synthesis, the conceptual structure underlying the field for most of the twentieth century. 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.