Dying Earth is a subgenre of science fantasy or science fiction which takes place in the far future at either the end of life on Earth or the end of time, when the laws of the universe themselves fail. Dominant themes include world-weariness, innocence, idealism, entropy, heat death of the universe, exhaustion or depletion of many or all resources, and the hope of renewal. A related subgenre set in the distant future of entropic decay is called entropic romance.[1]