The Systems of Sociology. Signed copy

Sorokin, Pitirim [The Systems of Sociology. Social Analytics]. Sistema Sotciologii. Sotsialnaya Analitika. 2 vol. Petrograd, Izd-skoe t-vo Kolos, 1920.  8vo, XIV, [2], 360 pp.; 463, [1] pp. In original wrappers. Signed and inscribed on p. 1 of volume II. In good (vol. I) and near good (vol. II) condition, vol. I partly unopened, small losses to spine and cover edges, tears to covers, stains, vol. II wrappers lightly browned, vol. II spine with cracks,  vol. II back cover torn off, vol. II with owner’s marks. Signed and inscribed by the author: 'Dorogomu Pavlu Isaevichu / Lyublinskomu / v znak glubokogo uvazheniya i / priznatel'nosti / ot avtora' [To the esteemed Pavel Isaevich Lyublinskiy, with profound respect and gratitude from the author]. First edition of Sorokin's first book on sociology.Pitirim Sorokin's signed Russian books are very rare. Russian-born distinguished American sociologist Pitirim Sorokin (1889-1968), who set the standard for the field, began his studies at th