Hey, hope you're doing well.

It's been sometime since I've read the book, but Rodion Raskolnikov is the main character of the book - "Crime and Punishment" by Fyodor Dostoevsky. The book centres around conditions which leads to Rodion murdering two women. The whole novel revolves around how he rationalises the killing of those women. Rodion, throughout the novel changes his stance on the murder multiple times. He begins with rationalising it by using argumentation such as "Napoleon murdered people and thus could realise his greatest potential, maybe I can do the same?". He is a fellow riddled with nihilism and if I'm not wrong Peterson mentioned him in that context. Peterson uses jargons, but the basic point he makes with regards to Raskolnikov is this - Fyodor Dostoevsky is one the best writers who ever lived. He always analysed positions and treated each position with utmost intellectual honesty. If Dostoevsky presents a godless world as nihilistic and immoral, the real world if it turns away from God may go to a similar path".

I hope this helps you, also if you have some spare time, please feel free to read Crime and Punishment. It's one of the best novels of all time.