This book is to be the basis for discussion when the International Missionary Council meets in Madras in December '38 to discuss the evangelistic program of the church. This function of witness-bearing has been abused, over-used and in far too many instances never used, so, as the Church's fundamental mission, this council is touching an all important problem. Because of the world-wide scope it is a subject with great and complex phases affected by international, national, racial and religious factors. While Dr. Kraemer is very humble over the tremendous task assigned him he has certainly proven himself extremely able and adequate. Gifted as many Hollanders are with amazing spiritual perception which makes him a sound theologian, he has also shared in the active life of the great University of Leyden. One feels its solidity and mellow age the moment one steps inside its portals. It is essentially a place of learning yet its wisdom is keenly in touch with life. Where else would one find the drawings of famous students on the walls of the main stairway, a winding affair not three feet wide? Leyden is unique and there Holland sent her future queen to be educated, for it was ideally equipped to give her an impartial knowledge of her world. This same background supplemented by years of teaching and mission work has been Dr. Kraemer's. Heartily endorsed by the Archbishop of York.