The Relative Value of the Processes Causing Evolution (Classic Reprint)


Book Description

Excerpt from The Relative Value of the Processes Causing Evolution But at times the feeling will not down, that a great number of eminent and able Biologists utterly fail to understand in how far their results have value in themselves, and in how far they are but building-stones. Many do not seem to see, that, without a timely attempt to utilize their results in construct ing a coherent whole of a higher order much detail is utterly wasted, being without significance in itself. It is very evident that many fail to see the forest because of all the trees. There is no real spirit of subordination of the different genet ical investigations to the main problems of evolution, in the work of any but Bateson and a few others. What we need from time to time, is to pause, and try to see' what all the others are doing, where they are going, what work is left undone, and where work is unnecessarily duplicated. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.










The Relative Value of the Processes Causing Evolution


Book Description

THE origin of species, the way in which evolution has taken place and is still progressing, seems, even now, to remain an open question. So much so, that three absolutely diverse theo­ ries of evolution still find their adherents. These three main theories are so different, that it would seem as if the real na­ ture of the process of species-formation must for ever remain a subject for speculation only, and as if good facts are wholly wanting. A minority of Biologists adhere to Lamarck's theory of the inheritance of adaptative changes induced by the environ­ ment; some incline to the view of Darwin and Weismann, that natural selection on· small, individual variations gradually changes species, and still others believe with de Vries, that new species spring into being spontaneously, by mutation, saltation. Judging from this diversity of opinion, it would certainly seem as if no important headway had been made since Darwin. This is very surprising, when we see how in the last fifteen years Genetics has become established as an actively develop­ ing branch of science, and counts by hundreds the Biolo­ gists who are engaged in genetical experimental investigations. All the data thus acquired, should have their significance for an insight into the process of evolution, the origin of species.







Evolution


Book Description

This volume emphasizes the period before 1950. During this period Wright thought of himself primarily as an experimental physiological geneticist rather than as a theoretical population geneticist.