I think that if people are instructed about anything, it should be about the nature of cruelty. And about why people behave so cruelly to each other. And what kind of satisfactions they derive from it. And why there is always a cost, and a price to be paid.
There's always going to be a little bit of autobiographical content to everything. It's how you lend some authority to what you write - you give it that weight by drawing on your direct experiences and indirect experiences from people that you know well, or a little.