I believe that the best answer to this question would be a tragedy. However, there may be more than one genre that accomplishes this goal. A tragedy is, specifically, a form of drama. It, "treats in a serious and dignified style the sorrowful or terrible events encountered or caused by a heroic individual" (this is the definition given in Encyclopedia Britannica.) A tragedy most definitely depicts the flaws in human nature.
Answer: Joyce organized the stories by the age of the protagonists.
Explanation:
Dubliners is a collection of stories about Irish middle class at the beginning of 20th century.
James Joyce, the author, decided to divide the collection of fifteen stories into three different sections related to the age of the protagonists. The first section dealt with childhood, the second one with adolescence and the last section focused on maturity.
I believe the answer to this question would be either a metaphor, idiom, or alliteration. But this would most likely be idiom because people can interpret different meanings of this phrase negative or positive and can take it personally or extensively.
It's because he couldn't find his mom so he went to war