Evolution The Remarkable History of a Scientific Theory

CHAPTER 1 Bursting the Limits of Time Georges Cuvier had a large head-a famously large head-and an ego more than sufficient to swell even it. From his position atop the French scientific establishment during the first third of the nineteenth century, he accumulated high academic posts and official honors like some favored children collect toys: never enough and all kept in play. For his contributions to laying the foundations of modern biology, Cuvier willingly suffered comparisons to Aristotle, the acknowledged founder of the science. As a naturalist, Cuvier fancied himself "the French Newton"-bringing order to the life sciences much as Isaac Newton brought order to the physical sciences. Cuvier's rigorous empirical methods opened windows into the earth's biological history that would lead others to a vision of organic evolution he steadfastly refused to see. More than any other naturalist, he so greatly influenced the style and substance of nineteenth-century biology that the history of the modern scientific theory of evolution rightly begins with him-its staunchest foe. Born in 1769 into an educated, bourgeois family in the Protestant, French-speaking portion of the independent French-German duchy of Wurttemberg, Cuvier was trained at a regional academy to serve in the duke's government. Pushed by his mother to excel academically, Cuvier's formal education included a solid introduction to natural history, a traditional subject encompassing such modern fields as biology, geology, oceanography, mineralogy, and paleontology. This subject became his passion. In 1788, with no government position open to him at home, Cuvier accepted employment as a private tutor for a French noble family in Normandy. There, as a sideline, he immersed himself in the study of marine invertebrates. From the relative safety of rural Normandy, Cuvier witnessed the French Revolution that began, from his perspective, with high hopes in 1789 but turned terribly ugly during the early 1790s. Becoming a citizen of France in 1793, when the French government annexed his homeland, Cuvier accepted a post in the revolutionary administration of Normandy even as he turned viscerally against the central regime's Terror and focused his own attentions on zoological fieldwork. In 1795, when a moderate republican government took power in Paris and promised to rebuild the central scientific establishment decapitated during the Terror, Cuvier moved to the capital in search of a career in science. There were plenty of openings for a naturalist of his obvious brilliance and driving ambition. Cuvier gained an assistantship at the renowned Museum of Natural History, and never looked back. His subsequent rise was meteoric. The study of natural history would never be the same. Cuvier concentrated his scientific research on the burgeoning field of comparative anatomy; he was convinced that the internal structure of an animal revealed its function and therefore its true nature. In biology as in all else, form followed function for Cuvier. His research profited greatly from his position at the world's premier natural-history museum-an institution that rapidly became ever more comprehensive in its zoological holdings as Napoleon's armies plundered the collections of Europe and sent home live, preserved, and fossilized specimens from as far afield as Russia and Egypt. Ultimately, Cuvier proposed that there are four (but only four) basic anatomical types (he called them "embranchements") of animals: vertebrates (with backbones), molluscs (with shells), articulates (such as insects), and radiates (such as starfish). "Lesser divisions," he wrote, "are only modifications superficially founded on development or on the addition of certain parts, but which in no way change the essence of the plan."1 This view, built solidly on anatomical analysis and still reflected (with modifications) in modern taxonomy, shatteLarson, Edward is the author of 'Evolution The Remarkable History of a Scientific Theory', published 2006 under ISBN 9780812968491 and ISBN 0812968492.