The excerpt below is from the article "The ABC of Dialectical Materialism," from the book Problems of Everyday Life by Leon Trotsky. Trotsky, a central leader of the Russian revolution, was defending the materialist foundations of scientific socialism in response to the rising pressures of bourgeois public opinion as Washington prepared its entry into World War II. The selection also appears in In Defense of Marxism as part of a longer article. Problems of Everyday Life is copyright 1973 by Pathfinder Press, reprinted by permission.

The dialectic is neither fiction nor mysticism, but a science of the forms of our thinking insofar as it is not limited to the daily problems of life but attempts to arrive at an understanding of more complicated and drawn-out processes. The dialectic and formal logic bear a relationship similar to that between higher and lower mathematics.

I will here attempt to sketch the substance of the problem in a very concise form. The Aristotelian logic of the simple syllogism starts from the proposition that A is equal to A. This postulate is accepted as an axiom for a multitude of practical human actions and elementary generalizations. But in reality A is not equal to A....

Every worker knows that it is impossible to make two completely equal objects. In the elaboration of bearing- brass into cone bearings, a certain deviation is allowed for the cones which should not, however, go beyond certain limits (this is called tolerance). By observing the norms of tolerance, the cones are considered as being equal (A is equal to A). When the tolerance is exceeded, the quantity goes over into quality; in other words, the cone bearings become inferior or completely worthless.

Our scientific thinking is only a part of our general practice, including techniques. For concepts there also exists "tolerance" which is established not by formal logic issuing from the axiom A is equal to A, but by dialectical logic issuing from the axiom that everything is always changing. "Common sense" is characterized by the fact that it systematically exceeds dialectical "tolerance"

Vulgar thought operates with such concepts as capitalism, morals, freedom, workers' state, etc., as fixed abstractions, presuming that capitalism is equal to capitalism, morals are equal to morals, etc. Dialectical thinking analyzes all things and phenomena in their continuous change, while determining in the material conditions of those changes that critical limit beyond which A ceases to be A, a workers' state ceases to be a workers' state.

The fundamental flaw of vulgar thought lies in the fact that it wishes to content itself with motionless imprints of reality, which consists of eternal motion. Dialectical thinking gives to concepts, by means of closer approximations, corrections, concretizations, a richness of content and flexibility, I would even say a succulence, which to a certain extent brings them close to living phenomena. Not capitalism in general, but a given capitalism at a given stage of development. Not a workers' state in general, but a given workers' state in a backward country in an imperialist encirclement, etc.

Dialectical thinking is related to vulgar thinking in the same way that a motion picture is related to a still photograph. The motion picture does not outlaw the still photograph but combines a series of them according to the laws of motion. Dialectics does not deny the syllogism, but teaches us to combine syllogisms in such a way as to bring our understanding closer to the eternally changing reality. Hegel in his Logic established a series of laws: change of quantity into quality, development through contradictions, conflict of content and form, interruption of continuity, change of possibility into inevitability, etc., which are just as important for theoretical thought as is the simple syllogism for more elementary tasks.

Hegel wrote before Darwin and before Marx. Thanks to the powerful impulse given to thought by the French Revolution, Hegel anticipated the general movement of science. But because it was only an anticipation, although by a genius, it received from Hegel an idealistic character. Hegel operated with ideological shadows as the ultimate reality. Marx demonstrated that the movement of these Ideological shadows reflected nothing but the movement of material bodies.

We call our dialectic materialist since its roots are neither in heaven nor in the depths of our "free will," but in objective reality, in nature. Consciousness grew out of the unconscious, psychology out of physiology, the organic world out of the inorganic, the solar system out of nebula. On all the rungs of this ladder of development the quantitative changes were transformed into qualitative. Our thought, including dialectical thought is only one of the forms of the expression of changing matter. There is place within this system for neither God, nor Devil, nor immortal soul, nor eternal norms of laws and morals. The dialectic of thinking, having grown out of the dialectic of nature, possesses consequently a thoroughly materialist character.

Darwinism, which explained the evolution of species through quantitative transformations passing into qualitative, was the highest triumph of the dialectic in the whole field of organic matter. Another great triumph was the discovery of the table of atomic weights of chemical elements and further the transformation of one element into another.

With these transformations (species, elements, etc.) is closely linked the question of classifications, just as important in the natural as in the social sciences. Linnaeus's system (eighteenth century), utilizing as its starting point the immutability of species, was limited to the description and classification of plants according to their external characteristics. The infantile period of botany is analogous to the infantile period of logic, since the forms of our thought develop like everything that lives. Only decisive repudiation of the idea of fixed species, only the study of the history of the evolution of plants and their anatomy prepared the basis for a really scientific classification.

Marx, who in distinction from Darwin was a conscious dialectician, discovered a basis for the scientific classification of human societies in the development of their productive forces and the structure of the relations of ownership which constitute the anatomy of society. Marxism substituted for the vulgar descriptive classification of societies and states, which even up to now still flourishes in the universities, a materialistic dialectical classification. Only through using the method of Marx is it possible correctly to determine both the concept of a workers' state and the moment of its downfall.

All this, as we see, contains nothing "metaphysical" or "scholastic," as conceited ignorance affirms. Dialectical logic expresses the laws of motion in contemporary scientific thought. The struggle against materialist dialectics on the contrary expresses a distant past, conservatism of the petty bourgeoisie, the self-conceit of university routinists and . . . a spark of hope for an afterlife.  
 
 
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