Here's the argument: contemporary mainstream fiction is very different from the storytelling of the deep past because of a demand side shift. Women consume most fiction today, and their tastes differ, on average, from those of men. How do they differ? To be short about it men are into plot, while women are into character. This means that modern literary fiction emphasizes psychological complexity, subtly and finesse. In contrast, male-oriented action adventure or science fiction exhibits a tendency toward flat monochromatic characters and a reliance on interesting events and twists.