Edward Llewellyn-Thomas (15 December 1917 – 5 July 1984) was an English scientist, university professor and, writing as Edward Llewellyn, a science fiction author. Llewellyn-Thomas published sixty scientific articles on psychology and eye movement over the course of his life. Active in the field of pharmacology, he took interest in the ethical development of biomedical science. His Douglas Convolution science fiction series concerns the breakdown of civilization after most of a generation is born sterile as a side effect of a widely used anti-cancer medication.