Polish poet and playwright, a forerunner of Expressionism and Surrealism who was noted for his mysticism and apocalyptic vision.

Miciński studied philosophy at the University of Kraków, traveled in Germany and Spain, and was influenced by Polish messianism and by Friedrich Nietzsche (Nietzsche, Friedrich) and Fyodor Dostoyevsky (Dostoyevsky, Fyodor). Miciński's passionate metaphysical concerns led him to an obsessive concentration on the problem of good and evil. His major works are strange and fantastic depictions of imaginary societies in which human embodiments of moral opposites engage in combat, using the weapons of mystical awareness and revolutionary political action. The novel Nietota: Księga tajemna Tatr (1910; “Nietota: The Secret Book of the Tatra Mountains”) is an imaginary re-creation of Polish life at the beginning of the 20th century. In the apocalyptic visions of his novel Xiądz Faust (1913; “Father Faust”), Miciński predicted that Polish-Russian brotherhood would come about through revolution. At the end of World War I, Miciński was assassinated in the chaos of the Russian Revolution while he was helping to organize the Polish armed forces.