1. The first sign of selfishness in the book is the way in which the prisoners often fought over food and other resources. For example, in one scene, a prisoner steals a piece of bread from Elie, leaving him to starve.
2. The second sign of selfishness is the way in which the prisoners often betrayed one another to the Nazis. For example, in one scene, a prisoner informs on a group of prisoners who are planning to escape, leading to their capture and execution.