A first full-length critical study of Chuvash-born poet Gennady Aygi (1934-2006), who is considered the father of late-Soviet avant-garde Russian poetry, this book charts the development of Aygi's poetics, which draws equally on Russian poetic and religious tradition, European literature and philosophy, and Chuvash literature, folk culture, and cosmology. Moving chronologically through Aygi's life and work from the 1950s to his final work in the early 2000s, the book concludes with an interview with American poet Fanny Howe about the importance of Aygi's work in translation. The volume places Aygi in the context of twentieth-century poetry of witness and reveals the global significance of his work.