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Indeed, the Ramakrishna Mission is something you should write about. Swamiji was a true universalist in many ways.
I wonder if you know that Vivekananda was also a very cosmopolitan spiritualist. Christmas is still celebrated at Belur Math Calcutta. He approved of meat eating too.
( Mutton curry of goat meat was his personal favourite)
In a sense Vivekananda symbolised Calcutta's Westernised Hinduism.