space opera and late-period Robert A. Heinlein tribute", referring to Heinlein's Friday. The theme and plot of Kameron Hurley's novel, The Light Brigade clearly echo those of Heinlein's Starship Troopers. Words and phrases coined Even outside the science fiction community, several words and phrases coined or adopted by Heinlein have passed into common English usage: Waldo, protagonist in the eponymous short story "Waldo", whose name came to mean mechanical or robot arms in the real world that are akin to the ones used by the character in the story. Moonbat used in United States politics as a pejorative political epithet referring to progressives or leftists, was originally the name of a space ship in his story "Space Jockey". Grok, a "Martian" word for understanding a thing so fully as to become one with it, from Stranger in a Strange Land, whose root meaning in Martian is "to drink". Space marine, an existing term popularized by Heinlein in short stories, the concept then being made famous by Starship Troopers, though the term "space marine" is not used in that novel. Speculative fiction, a term Heinlein used for the separation of serious, consistent science fiction writing, from the pop "sci fi" of the day. Inspiring culture and technology In 1962, Oberon Zell-Ravenheart (then still using his birth name, Tim Zell) founded the Church of All Worlds, a Neopagan religious organization modeled in many ways (including its name) after the treatment of religion in the novel Stranger in a Strange Land. This spiritual path included several ideas from the book, including non-mainstream family structures, social libertarianism, water-sharing rituals, an acceptance of all religious paths by a single tradition, and the use of several terms such as "grok", "Thou art God", and "Never Thirst". Though Heinlein was neither a member nor a promoter of the Church, there was a frequent exchange of correspondence between Zell and Heinlein, and he was a paid subscriber to their magazine, Green Egg. This Church still exists as a 501(C)(3) religious organization incorporated in California, with membership worldwide, and it remains an active part of the neopagan community today. Zell-Ravenheart's wife, Morning Glory coined the term polyamory in 1990, another movement that includes Heinlein concepts among its roots. Heinlein was influential in making space exploration seem to the public more like a practical possibility. His stories in publications such as The Saturday Evening Post took a matter-of-fact approach to