Forster spends most of the first part of the novel developing the characters that represent the British (Ronnie and his colleagues and friends) and the Indians (Aziz). The more we learn about them, the more it seems that they will never be able to be friends country to country. Mrs. Moore, Adela, and Mr. Fielding are British people, however, that tend to bridge the gap. by chapter XI, we see a friendship developing between Aziz and Mr. Fielding that seems to indicate that if there is to be friendship, it must start on the human level, person to person. Forster does not seem to be openly critical of British colonialism as some writers, but he does seem to imply that the British have a long way to go in being proper stewards of their empire. As far as being friends, the culture of India is so far removed from that of the British in this novel, that it doesn't seem possible that the two countries will be able to be friends. Certainly not in the way that the British Empire is friends with its former 13 colonies that are now the United States. In this case, the culture - religion, language, etc. - are similar and therefore friendly relations are easier. But in India, with its different cultures, its different religions, its language -- there does not seem to be much hope for friendship on the political front.
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