For the second edition, Lem chose not to revise the original. Recognizing the naivete of his hopes for cybernetics, he constructed a supplement to the first dialogue, which consists of two critical essays, the first a summary of the evolution of cybernetics, the second a contribution to the cybernetic theory of the "sociopathology of governing," amending the first edition's discussion of the pathology of social regulation; and two previously published articles on related topics. From the vantage point of 1971, Lem observes that original book, begun as a search for methods "that would increase our understanding of both the human and nonhuman worlds," was in the end "an expression of the cognitive curiosity and anxiety of modern thought."