All these circumstances undoubtedly favoured the success of the socialistic agitation at the period it started; but, when everything is said, it is still doubtful whether German socialism would ever have come into being but for Lassalle. Its fermenting principle has been less want than positive ideas. This is shown by the fact that it was at first received among the German working classes with an apathy that almost disheartened Lassalle; and that it is now zealously propagated by them as a cause, as an evangel, even after they have emigrated to America, where their circumstances are comparatively comfortable. The ideas it contains Lassalle found for the most part ready to his hand. The germs of them may be discovered in the writings of Proudhon, in the projects of Louis Blanc. Some of them he acknowledges he owes to Rodbertus, others to Karl Marx, but it was in passing through his mind they first acquired the stamp and ring that made them current coin. Contentions about the priority of publishing this bit or that bit of an idea, especially if the idea be false, need not concern us; and indeed Lassalle makes no claim to originality in the economical field. He was not so much an inventive as a critical thinker, and a critical thinker of almost the first rank, with a dialectic power, and a clear, vivid exposition that have seldom been excelled. Any originality that is claimed for him lies in the region of interpretation of previous thought, and that in the departments of metaphysics and jurisprudence, not of economics.