In 1953 two men, Edmund Hillary and Tenzing Norgay, reached the summit of the world in an act that symbolised everything good about human cooperation and courage. Sixty years later, news channels around the world report the world’s highest brawl as Western climbers flee a mob of angry Sherpas. The obvious explanation is that greed and ego have hollowed out a once-noble enterprise. But the real story behind events in 2013 is much more interesting — and more inspiring — than headlines suggest.