ExcitableBoy:
You may well be right about 1938 being a landmark year in climbing history. 1953 and 1963 also might be considered landmark years. in 53 Hillary and Tenzing climbed Everest and Hermann Buhl made the first solo ascent of Nanga Parbat. In 63 Willi Unsoeld and Tom SHorbein made the first technical route on a 8,000 peak by traversing Everest by the new West Ridge Route and down the South Col after surviving the first overnight above 28,000'.