In Ancient Greece, heroes often did not last long. Achilles comes to mind, but there are others. For the Greeks, there was something almost enviable about the hero whose life ended at the zenith, at the peak of physical and technical prowess. I couldn’t help reflecting on that when I was talking with historian Mary Ehrlander. She has a new book out on the first person to summit Denali, Walter Harper. Not long after his history-making achievement, Walter and his young wife perished in a maritime disaster.