This is a reprint of the first edition of a text originally published in 1902 by The Macmillan Company. In this treatise, noted psychologist Baldwin (Princeton U.) explains his ideas regarding the mechanism that mediates the influence of individual adaptations on the course of phylogenetic evolution. Included in the appendices are full citations of writings by some of Baldwin's contemporaries regarding organic selection and orthoplasty, followed by reviews of three books on related topics. Annotation ©2005 Book News, Inc., Portland, OR