The ecumenical movement is now old enough to merit a second volume to its history. It covers the twenty years from 1948 to 1968; or in the esoteric language of the movement, from Amsterdam to Uppsala. The book inevitably abounds in this kind of esoteric language; conferences, committees and consultations have been held at innumerable places, and the name of every such place thereupon becomes the name of an event as well. One is used to the habit in general history, in which it seems normal to talk about before and after Trent or Versailles; but the over-employment of it in specialized history creates an atmosphere of a close little world of people in the know. So, too, councils and associations and conferences have multiplied, each equipped with its proper set of initials. Under the heading ‘Abbreviations’ eighty-six of these code names and letters, with their meanings, are listed at the beginning of the work.

All this makes it a book that is hard—indeed, I would say impossible—to read. Had the fifteen contributors to the volume been literary historians of genius, it is doubtful whether they could have made it much more readable than it is; the material is too intractable. What they have provided is an indispensable reference book for the study and understanding of the contemporary ecumenical movement.