The object of the research is the phenomenon of creative coexistence of writers caused by problems of elaborating new poetics, in many respects relying on the «group» character of its origin and producing. Used as a working term is the concept «conciliarism» as a self-reflective attempt of B. Pilnyak to comprehend the «collective» creative work as a whole in postrevolutionary years. Unlike B. Pilnyak who was under A. Bely and I. Bunin’s considerable influence, V. Ivanov transformed his own «Siberian» poetics in a unique way at all its levels. While
the «assembly» prose of B. Pilnyak used the direct citing of the colleague on the basis of «conciliarism», in V. Ivanov’s works this principle was expressed in a larger scale of narration, in a priority of urban themes and plots, and in the economy of descriptive means. Comparison and correlation of the works of the two writers substantiates the suggested conception rather clearly.