Books that present a utopian future in which the inequities and sufferings of the present are replaced by more harmonious and rational social arrangements will always find enthusiastic buyers
Since gloomy books predicting that even more terrifying times await us are clearly not of this genre, they are unlikely to be very popular
Action movies that involve complicated and dangerous special-effects scenes are enormously expensive to produce. Hence, since traditional dramatic or comedic films contain no such scenes, it is probable that they are relatively inexpensive to produce.