It deals with various science fiction elements such as spontaneous generation, futurology, the end of the world and doomsday, resurrection, and the afterlife.
Classical notions of spontaneous generation, which can be considered under the modern term abiogenesis, held that certain complex, living organisms are generated by decaying organic substances.
He believed there were internal molds that shaped the spontaneous generation of each family and that the families themselves were entirely and eternally distinct.