This volume includes works by A. Yaroslavsky’s closest associates and publications of the Northern Group of Biocosmists-Immortalists headed by him. This is G. Butorin’s book “The Umbilical Cord of Humanity” (1922), the only issue of the magazine “Immortality” (1922), I. Yakovlev’s book “Splashes of Bestialism” (1923) and the collection “Biocosmists: Ten Pieces” (1923). A significant part of the materials is being republished for the first time.