A coherent treatment of the flow of ideas throughout Darwin's works, this volume presents a unified theoretical system that explains Darwin's investigations, evaluating the literature from a historical, scientific, and philosophical perspective.

The first book in English to examine in detail the scientific work of 19th-century Russian evolutionists, and the first in any language to explore the relationship of their theories to their economic, political, and natural milieu.

Anton Dohrn rejected the popular Amphioxus-ascidian theory of vertebrate origin, which saw Amphioxus as the most primitive vertebrate and ascidians as vertebrate ancestors. Instead he argued for the segmented annelids as the more likely candidate. Attacked for being 'unscientific' by such popular morphologists as Carl Gegenbaur and Ernst Haeckel, Dohrn countered with similar accusations. Since the debate peaked as Dohrn was establishing his Stazione Zoologica in Naples at the end of the nineteenth century, it gained him valuable attention and may (...) have encouraged him to retain his view even in the face of new and problematic evidence. This paper explores Dohrn's contributions and the underlying commitments revealing what he regarded as important in science. (shrink)