THE HE question with which this book deals is whether the Christian Church has any contribution to make to the solution of the problems involved in the contact of different races in the world today; and if so what is the nature of that contribution and how it can best be made. The book does not attempt to make any independent contribution to the biological and anthropological aspects of race, though I have done my best to take account of the conclusions of modern science in regard to these matters. These aspects of the subject are undoubtedly important, but vastly more important, as I have tried to show, are the ethical problems which arise from the contact of races and which constitute a grave menace to the peace of the world and to the co-operation and progress of its peoples. It is only in wrestling with the actual conditions of human life that the meaning, depth and power of the Christian view of the world are disclosed. Any attempt therefore to face honestly in the light of the Christian ideal the grave issues to which attention is directed in the following pages ought to be suggestive and fruitful. Whatever be the shortcomings of this volume, and I have no doubt that they are many, the setting in juxtaposition of the Christian ideal for human society and the existing relations between different races is in itself, I hope, not without value. I have not come across any book in which this attempt has been made, ¹ and I shall be amply rewarded