The species concept is one of the oldest and most fundamental in biology. And yet it is almost universally conceded that no satisfactory definition of what constitutes a species has ever been proposed. The present article is devoted to an attempt to review the status of the problem from a methodological point of view. Since the species is one of the many taxonomic categories, the question of the nature of these categories in general needs to be entered into.

Th. Dobzhansky played a special role in the reception and development of the “synthetic theory of evolution,” as well as in the establishment of scientific connections between Soviet and U.S. evolutionists, and first and foremost, geneticists. These connections greatly influenced the development of Soviet genetics, of evolutionary theory and evolutionary biology as a whole, and in particular the restoration of Soviet genetics in the late 1960s. A discussion of Dobzhansky’s correspondence and collaboration with colleagues in his native country, (...) moreover, allows for an improved understanding of the complex and dramatic history of Soviet genetics and evolutionary theory. It also provides novel insights into the interactions between scientists and authorities in the Soviet Union. (shrink)

This is the correspondence (1959–1969), on the nature of the evolutionary process, between the biologist Theodosius Dobzhansky and the historian John C. Greene.

Should the philosophy of biology deal with organismic, or with molecular aspects , or with both ? We are, of course, not the first to appreciate the ...

. Introductory Remarks THEODOSIUS DOBZHANSKY The problems of reduction in biology are currently of considerable theoretical interest and practical ...

This collection features five essays from noted theologians, philosophers, geneticists, and biologists who discuss the sweeping impact of Charles Darwin's _On the Origin of Species_ on their respective fields. This volume, edited by Ralph Buchsbaum, professor of biology at the University of Pittsburgh, was published to celebrate the centenary of Darwin's announcement in 1858, along with Alfred Russel Wallace, of their independent discovery of the process of natural selection. Darwin's book was published one year later.

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our (...) continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. (shrink)

Carolvs Praechter, uir clarissimus, optime exposuit quo modo rumores et fabulae de Platoni s itineribus gradatim orerentur, augerentur, firmarentur.1 Inter scriptores, qui nobis tales narrationes tradiderunt, est Valerius Maximus, qui her Aegyptiacum et Italicum his uerbis narra.