The best short story of all time is a subjective concept as different people have different preferences. However, there are some short stories that have stood the test of time and are widely regarded as masterpieces. One such story could be "The Lottery" by Shirley Jackson. In this story, a small town holds an annual lottery with a shocking and unexpected outcome. The simple yet powerful narrative keeps the reader on the edge of their seat until the very end. Another contender for the title of the best short story could be "The Gift of the Magi" by O. Henry. This heartwarming tale of a young couple's selfless love and sacrifice during Christmas is both touching and thought-provoking. These are just a few examples of the many great short stories that have been written throughout history, each with its own unique charm and appeal.