The other reviews of this wonderful film will give the reader more than enough motivation to watch it himself. I would like to add the point, however, that Mallory & Co. did not consider themselves to be personally superior to the natives. The film expresses a lot of respect for these hearty and isolated people, including praises for their unremitting cheerfulness towards their work. Such praises have been a part of the history of Everest exploration since that time. The Tibetan and Nepalese quite admirable. However it is probably true that Mallory and Irvine did believe they came from a more advanced society and I think that too is indisputable.
We are so steeped in cultural relativism that we fail to make this distinction. It is a distinction that the natives themselves have made; as over the decades they have adopted as many innovations as have been introduced to their country. After seeing many films of Everest explorations I suspect that they have less nostalgia about their "old ways" and modes of living than many Westerners--steeped in romantic notions about the purity indigenous peoples--believe.