How do paragraphs 15-16 contribute to the
development of the text's central idea?

He claims that indifference is not the point of departure, but the final step. Wiesel says the indifference is favorable to the enemy. The paragraphs 15-16 contribute since Wiesel refers to the Holocaust in Auschwitz by saying, in an ironic way of course, that if governments of other countries in the world would have known what was happening to Jews, they would have helped. Obviously, the whole world knew theand no one did nothing to stop it.