The relationship between Native Americans and the Euro-American settle
rs has evolved from the latter seeking to end the separate identity of
the former to one in which the U.S. government uses Native rights to
control large-scale resource problems. This new relationship arose out
of a need to control water in Western states for irrigation, but has
expanded into other areas. The Navajo sheep reductions of the 1930s an
d 1940s may be seen as an instance of this relationship. Concerns abou
t siltation behind the Hoover Dam justified a program that dramaticall
y transformed the Navajo economy. A second case concerns conflict over
a caribou herd in northwestern Alaska. The conflict eventually led to
the Federal government taking management of fish and game on Federal
lands back from the state government. Both these cases show the develo
pment of a technocracy, based on Federal trusteeship over Native resou
rces, concerned with the control of nature similar to that observed in
Wittfogel's writings on Chinese irrigation.