John MacNie (c. 1844 – 31 October 1909),[1] also known by his pen name Ismar Thiusen under which he wrote the novel The Diothas,[2] was an educator and science fiction writer. Born in Scotland in about 1844, he came to America in 1867 where he first obtained a job teaching Greek and Latin at a preparatory school in Newberg, New York.[3]