We, as signatories to this introduction, although we may differ oversome aspects of genetic, biological, anthropological and sociologicaltheory, believe that statesmen and judges today frequently take positions based upon an inadequate knowledge of the facts so far as theyto the nature of man. Therefore, we have no hesitation inplacing on record our disapproval of what has been all too commonlya trend since 1930. We do not believe that there is anything to bedrawn from the sciences in which we work which supports the viewthat all races of men, all types of men, or all ethnic groups are equaland alike, or likely to become equal or alike, in anything approachingthe foreseeable future. We believe on the contrary that there are vastareas of difference within mankind not only in physical appearance,but in such matters as adaptability to varying environments, and indeep psychological and emotional qualities, as well as in mentalability and capacity for development. We are of the opinion that in
ignoring these depths of difference modern man and his political representatives are likely to find themselves in serious difficulties sooner or later.
Whatever may be said for or against minor or detailed points made by the author of this book, we feel that it deserves the serious attention of both scientists and public men wherever racial problems exist.
The facts in it cannot much longer be ignored. It probes to the core of an abscess, yet does so with a healing touch. There is logic and common sense in these pages; there is also inescapable scientific validity.
