As an epoch-marking contribution to Natural History in the widest sense, we rank the picture which Darwin gave to the world of the web of life, that is to say, of the inter-relations and linkages in Nature. For the Biology of the individual--if that be not a contradiction in terms--no idea is more fundamental than that of the correlation of organs, but Darwin's most characteristic contribution was not less fundamental, --it was the idea of the correlation of organisms

Neue Gedanken zur Vererbungsfrage eine Antwort an Herbert Spencer by August Weismann. This book is a reproduction of the original book published in 1895 and may have some imperfections such as marks or hand-written notes.