Our age, with its many disquietudes, has been peculiarly open to radical critiques in ethics and polities. Peter Brock's account of pacifism, therefore, appears at a time when interest in the subject should be greater than in certain previous periods. We have not had comprehensive studies of the American peace movement since those of Devere Allen and Merle Curti. Brock's very detailed work does not, of course, purport to be an examination of the peace movement as a whole but only of the pacifist stream within it — that tendency which in principle rejects all war, whatever the professed goals, and stresses the notion” of non-violence. Although be treats the theme only down to 1914, some of the seminal issues of pacifist thought and practice in any age — including our own — are illustrated in this massive volume. The extensive bibliography could be a point of departure for many specialized studies.