Since the first appearance of this book (october, four editions of it have been printed without any change in the text. But now, when my publishers are about to send it out into the world for the fifth time, I feel that the task of subjecting it to a thorough revision can no longer be delayed. There are several reasons why such revision should be undertaken at this time. The last six years have been years of uncommon interest and eventfulness for the socialist movement of this country, and no history of the movement can claim to be complete without at least a brief record of these events. The task of bringing the narrative down to date has made necessary the addition of an entirely new and somewhat extended chapter.