Artist Patricia Thaxton just won a high-profile commission to create a work for Harvard Square. IdeasWe spend huge chunks of our lives immersed in novels, films, TV shows, and other forms of fiction. Some see this as a positive thing, arguing that made-up stories cultivate our mental and moral development. But others have argued that fiction is mentally and ethically corrosive. It’s an ancient question: Does fiction build the morality of individuals and societies, or does it break it down?