"Solution Unsatisfactory" is a 1941 science fiction short story by American writer Robert A. Heinlein. It describes the US effort to build a nuclear weapon in order to end the ongoing World War II, and its dystopian consequences to the nation and the world. The story is collected in The Worlds of Robert A. Heinlein in 1966, Expanded Universe in 1980, and the Science Fiction Book Club omnibus Off the Main Sequence: The Other Science Fiction Stories of Robert A. Heinlein in 2005. An Italian translation appeared in 1967 and a German translation in 1972.