Religious movement beginning in the 19th century based in Plateau Native North American spiritual practices. Smohalla, a Wanapum prophet and leader, developed the faith after receiving visions on how to remove white settlers from the Columbia River area. Followers believed adherence to traditional practices and peaceful opposition to colonization would revert society back to their pre-contact lifeways. The Dreamer religion continues to be observed today, with revival of Native culture and protection of the environment as major themes.