Charles Darwin’s On the Origin of Species is the most important and yet least read scientific work in the history of science. Now James T. Costa―experienced field biologist, theorist on the evolution of insect sociality, and passionate advocate for teaching Darwin in a society in which a significant proportion of adults believe that life on earth has been created in its present form within the last 10,000 years―has given a new voice to this epochal work. By leading readers line by line through the Origin , Costa brings evolution’s foundational text to life for a new generation. The Annotated Origin is the edition of Darwin’s masterwork used in Costa’s course at Western Carolina University and in Harvard’s Darwin Summer Course at Oxford. A facsimile of the first edition of 1859 is accompanied by Costa’s extensive marginal annotations, drawing on his extensive experience with Darwin’s ideas in the field, lab, and classroom. This edition makes available an accessible, useful, and practical resource for anyone reading the Origin for the first time or for those who want to reread it with the insights and perspective that a working biologist can provide. “ On the Origin of Species has too long been one of those worthy books whose fate is to be lauded but unread. Jim Costa's deft commentary―an authoritative and engaging mix of history and science―will change that. The Origin is forbidding and inaccessible no longer―it has evolved! The Annotated Origin restores, for modern readers, the freshness and excitement that made it a bestseller when it first appeared. Charles Darwin, I'm sure, couldn't wish for a better 200th birthday present.” ― Andrew Berry, editor of Infinite Tropics: An Alfred Russel Wallace Anthology “Despite being 150 years old, the Origin is a living text for biologists. It is full of unsurpassed natural history observations, a model of careful scientific argument that still can catch the imagination with the grandeur of the views it puts forward. Jim Costa has provided an exceptionally lucid explanation.” ― Janet Browne, author of Charles Darwin: The Power of Place “Brilliant.” ― Bernd Heinrich, author of The Snoring Bird: My Family's Journey through a Century of Biology “ The Annotated Origin is a culminating and, in an original manner of its own, the most useful of the centennial Darwin publications. It gives you the choice of reading page by page the original Origin , or its modern interpretation, or both together.” ― Edward O. Wilson “Jim Costa does a wonderful job of annotating Darwin's groundbreaking classic On the Origin of Species . In more than 900 notes, he explains, expands, contextualizes and updates much of what Darwin had to say about evolution and its causes… Costa's thoughtful and informative notes enable readers to gain a much fuller appreciation for Darwin's genius and breadth of knowledge―a fine tribute in the great scientist's bicentennial year.” ― Publishers Weekly “Clearly worth attention… Costa makes use of his experience as a field naturalist and his knowledge of the modern literature of evolutionary biology to illumine many passages in Darwin's work.” ― Richard C. Lewontin , New York Review of Books “Everyone knows about [ On the Origin of Species ], but I venture to guess that few non-scholars have actually read it. Now, along comes James T. Costa with this facsimile. The index to the new edition, and especially Costa's wonderful annotations, make this classic text not only approachable, but positively inviting… Biologists will probably enjoy this book, but it is a particular gift to laypeople, especially to biology teachers. They can take excerpts from the book into their classes and show their students how Charles Darwin arrived at his insightful and revolutionizing idea.” ― Dudley Barlow , Education Digest “ The Annotated Origin should be on the shelf of every practitioner of the life sciences. James T. Costa has rendered a valuable service to the profession by making the single most influential work in the history of biology both accessible and relevant to modern readers. Costa is aware that most students of biological science have at best merely glanced at Darwin's great book, but certainly have never read it through. By making visible what he calls the breathtaking sweep of Darwin's method, he has made a compelling argument for taking a page from Darwin's playbook in making the case for biological evolution… Darwin has sometimes been portrayed as a plodding scientist, a good observer whose second-rate status is masked by the pregnancy of the grand idea he stumbled upon. Costa's work is a wonderful refutation of this portrait. No one who follows Costa through The Annotated Origin can possibly doubt Darwin's exceptional stature. There is no better tribute he could have made for this celebration of Darwin's 200th birthday and the 150th anniversary of the publication of his masterpiece.” ― Frederick Gregory , BioScience “It's enti