When mainstream authors like Eric Flint complain that the science fiction establishment, and its gatekeeper the Hugo Awards, has “drift[ed] away from the opinions and tastes of… mass audience[s],” prioritizing progressive messaging over plot development, the response from the Left is uniform: Science fiction is by its very nature progressive. It’s baked into the cake, they say. This is a superficially plausible claim. With its focus on the future, its embrace of the unfamiliar and other-worldly, and its openness to alternative ways of living, it is hard to see how the genre could be anything but progressive. In fact, studies indicate that interest in SF books and movies is strongly correlated with a Big Five personality trait called openness to experience, which psychologists say is highly predictive of liberal values. But openness to experience also correlates with libertarianism and libertarian themes and ideas have exercised far greater influence than progressivism over SF since the genre’s inception. From conservatarian voices like Robert Heinlein, Larry Niven, Vernor Vinge, Poul Anderson, and F. Paul Wilson to those of …