Free Men

"Free Men" (1966) is a science fiction short story by American writer Robert A. Heinlein. It is his last known published short story, succeeding "All You Zombies" (1959). It first appeared in his collection The Worlds of Robert A. Heinlein (1966) and was later collected in Expanded Universe. It is copyrighted by Heinlein in 1966, but was probably written between 1947 and 1950, judging from the foreword in Expanded Universe, which mentions that it was written after Rocket Ship Galileo.