With shifting narrators and a big twist at the end, this short story by Jorge Luis Borges tackles themes of violence, vengeance, the clash of theory and practice, and how we judge others.
How do you explain the effects of random chance? Borges invented an all-powerful Lottery governing all possible events in life to help us think through it.
This section in A Universal History of Iniquity includes several interesting fragments, some of which could provide the basis for interesting stories but are not really developed.