Navajo
The Navajo Nation works to maintain an economy for a population of 250,000 plus members. The discovery of oil on Navajo lands in the 1920s started the tribe towards building a systematic form of government. A tribal government was established in 1923 to deal with oil exploration. The Navajo Nation is currently the largest and most sophisticated form of Native American government. The Navajo Nation has become a wealthy nation in its own right.