This chapter explores the cultural obsession with entropy in the London-based magazine, New Worlds. Associated with the 1960s New Wave, New Worlds was instrumental in bringing an experimental literary sensibility to the genre of science fiction. Writing against the grain of prevailing academic criticism, the chapter unearths a latent utopian impulse within the metaphor of entropy. Artists, writers, and critics associated with New Worlds considered the second law of thermodynamics, or entropy, to be a fitting image for the dystopian mood of post-war British literature and culture. The chapter argues that their obsession with the disintegration of society at a time of post-imperial decline reveals, rather, hope among the ruins. It offers a close reading of British-based artist and writer Pamela Zoline’s short story “Heat Death of the Universe” (1967), in which the boredom of a Californian housewife stretches into a Dadaist utopian daydream about the heat death of the universe, the theoretical endpoint of entropy. By situating fictions published in New Worlds within the wider political contexts of anti-colonial resistance, the New Left, Second Wave Feminism, and Gay Liberation, the chapter uncovers a persistent strain of utopian possibility through Britain’s cultural obsession with entropy in the 1960s.