...The proposal to think the determination of the elements of a whole by the structure of the whole posed an absolutely new problem in the most theoretically embarrassing circumstances, for there were no philosophical concepts available for its resolution. The only theoretician who had had the unprecedented daring to pose this problem and outline a first solution to it was Spinoza. But, as we know, history had buried him in impenetrable darkness. Only through Marx, who, however, had little knowledge of him, do we even begin to guess at the features of that trampled face.