The subject matter of the discussion, besides being of deep interest, is timely. True to the Marxian observation that, contrary to the law of bourgeois revolutions, the law, obedient to which the revolutionary movement of the proletariat acts, is to "criticize itself constantly; constantly to interrupt itself in its own course; to come back to what seems to have been accomplished in order to start over anew; to scorn with cruel thoroughness the half measures, weaknesses and meannesses of its first attempts; to seem to throw down its adversary only in order to enable him to draw fresh strength from the earth, and again to rise up against it in more gigantic stature; to constantly recoil in fear before the undefined monster magnitude of its own objects - until, finally, that situation is created which renders all retreat impossible, until the conditions themselves cry out: Hic rhodus, hic salta ! - true to that Marxian observation, the Labor Movement of America is today thoroughly criticizing itself. Daniel DeLeon, As To Politics, 1907