of thinking, which formulated not only the laws of thought, but also the laws of evolution, albeit, unfortunately, in a language which offered immense difficulties to his readers. The essence of his logic is the dialectic. By dialectic the old Greeks understood the art of discourse and rejoinder, the refutation of an opponent by the destruction of his assertions and proofs, the bringing into relief of the contradictions and antitheses. When examined closely, this art of discussion, in spite of its contradictory and apparently negative (destructive) intellectual work, is seen to be very useful, because, out of the clash of opposing opinions, it brings forth the truth and stimulates to deeper thought. Hegel seized hold of this expression, and named his logical method after it. This is the dialectical method, or the manner of conceiving the things and beings of the universe as in the process of becoming, through the struggle of contradictory elements and their resolution. With its aid, he brings to judgment the three original laws of thought which have already been alluded to. The principle of identity is an abstract, incomplete truth, for it separates a thing from the variety of other things, and its relations to them. Everybody will see this to be true. Let us take the proposition: the earth is the earth. Whoever hears the first three words of this proposition naturally expects that what is predicated of the earth should tell him something which distinguishes the earth from other things. Instead of this, he is offered an empty, hard and fast identity, the dead husk of an idea. If the principle of identity is at best only an incomplete truth, the principles of contradiction and of the excluded middle are complete untruths. Far from making a thought nonsense, contradiction is the very thing which unfolds and develops the thought, and hence, too, the object which it expresses. It is precisely opposition, or antithesis, which sets things in motion, which is the mainspring of evolution, which calls forth and develops the latent forces and powers of being. Had the earth as a fiery, gaseous mass remained in that state, without the contradiction, that is, the cooling and condensation, taking place, then no life would have appeared on it. Had the State remained autocratic, and the contradictory principle, middle-class freedom, been absent, then the life of the State would have become rigid, and the bloom of culture rendered impossible. Had Capitalism remained without its proletarian contradiction, then it would have reverted to an industrial feudalism. It is the contradiction, or the antithesis, which brings into being the whole kingdom of the potentialities and gifts of nature and of humanity. Only when the contradictory begins to reveal itself does evolution to a higher plane of thought and existence begin. It is obvious that we are not concerned here with logical contradictions, which usually