In the nineteenth and early twentieth century, a controversial school of Russian religious and scientific thinkers emerged, united in the conviction that humanity was entering a new stage of evolution and must assume a new, active, managerial role in the cosmos. The ideas of the Cosmists have in recent decades been rediscovered and embraced by many Russian intellectuals. In the first account in English of this fascinating tradition, George M. Young offers a dynamic and wide-ranging examination of the lives and ideas of the Russian Cosmists.