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In page Haida people:

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In 1884, the potlatch was outlawed throughout the coast, under an amendment to the Indian Act, known as the potlatch ban.[4] The elimination of the potlatch system destroyed financial relationships and seriously interrupted the cultural heritage of coastal people. As the islands were christianized, many cultural works such as totem posts were destroyed or taken to museums around the world. This significantly undermined Haida's self-knowledge and further diminished morale.[citation needed]